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Essentials of anatomy & physiology Kenneth Saladin
Title: Hole’s essentials of human anatomy & physiology / David Shier, Washtenaw Community College; Jackie Butler, Grayson College, Ricki Lewis, Albany Medical College.
Other titles: Hole’s essentials of human anatomy and physiology
Description: Thirteenth edition. | New York, NY : McGraw-Hill Education, [2018] | Includes indexes.
Identifiers: LCCN 2016030709 | ISBN 9781259277368 (alk. paper)
Subjects: LCSH: Human physiology. | Human anatomy.
Classification: LCC QP34.5 .S49 2018 | DDC 612—dc23 LC record available at https://lccn.loc.gov/2016030709
The Internet addresses listed in the text were accurate at the time of publication. The inclusion of a website does not indicate an endorsement by the authors or McGraw-Hill Education, and McGraw-Hill Education does not guarantee the accuracy of the information presented at these sites.
www.mhhe.com
OF ORGANIZATION
Introduction to Human Anatomy and Physiology 9
Chemical Basis of Life 39
Cells 60
Cellular Metabolism 86
Tissues 104
UNIT 4
Blood 327
Cardiovascular System 349
Lymphatic System and Immunity 386
UNIT 5
AND MOVEMENT
Integumentary System 127
Skeletal System 143
Muscular System 188 UNIT 3
AND COORDINATION
Nervous System 223
The Senses 273
Endocrine System 301
AND EXCRETION
Digestive System and Nutrition
Respiratory System 453 17. Urinary System 479 18. Water, Electrolyte, and Acid-Base Balance 502
UNIT 6
HUMAN LIFE CYCLE
Reproductive Systems 518 20. Pregnancy, Growth, Development, and Genetics 549
ABOUT THE AUTHORS
thirty years of experience teaching anatomy and physiology, primarily to premedical, nursing, dental, and allied health students. He has effectively incorporated his extensive teaching experience into another studentfriendly revision of Hole’s Essentials of Human Anatomy and Physiology and Hole’s Human Anatomy and Physiology. His interest in physiology and teaching began with a job as a research assistant at Harvard Medical School from 1976-1979. He completed his Ph.D. at the University of Michigan in 1984, and served on the faculty of the Medical College of Ohio from 1985-1989. He began teaching at Washtenaw Community College in 1990. David has recent experience in online course delivery, including recording lectures for so-called “flipped” classrooms. He has also been interested in the relationship between pedagogy and assessment, and the use of tools traditionally associated with assessment (e.g. lab quizzes) as pedagogical tools, often associated with group activities.
DIGITAL AUTHORS
JACKIE BUTLER’S professional background includes work at the University of Texas Health Science Center conducting research about the genetics of bilateral retinoblastoma. She later worked at Houston’s M. D. Anderson Hospital investigating remission in leukemia patients. A popular educator for more than thirty years at Grayson College, Jackie has taught microbiology and human anatomy and physiology for health science majors. Her experience and work with students of various educational backgrounds have contributed significantly to another revision of Hole’s Essentials of Human Anatomy and Physiology and Hole’s Human Anatomy and Physiology. Jackie Butler received her B.S. and M.S. degrees from Texas A&M University, focusing on microbiology, including courses in immunology and epidemiology.
LESLIE DAY earned her B.S. in Exercise Physiology from UMass Lowell, an M.S. in Applied Anatomy & Physiology from Boston University, and a Ph.D. in Biology from Northeastern University. She currently works as an Associate Clinical Professor and Associate Chair in the Department of Physical Therapy, Movement and Rehabilitation Sciences at Northeastern University with her main teaching role in upper level Gross Anatomy and Neuroanatomy courses, but still loves teaching her introductory anatomy course. She has received five teaching awards at the universities, including the coveted University Excellence in Teaching Award. Her current research focuses on the effectiveness of different teaching pedagogies, including the flipped-classroom and various technology. She brings her love for anatomy and quest for trying new technology into the classroom to make for a dynamic evidence-based teaching style that is friendly to all students.
RICKI LEWIS’s career
communicating science began with earning a Ph.D. in Genetics from Indiana University in 1980. It quickly blossomed into writing for newspapers and magazines, and writing the introductory textbook Life. Since then she has taught a variety of life science courses and has authored the textbook Human Genetics: Concepts and Applications and books about gene therapy, stem cells, and scientific discovery. She is a genetic counselor for a large medical practice, teaches a graduate online course in “Genethics” at Albany Medical College, and writes for Medscape Medical News and Rare Disease Report. She writes the popular DNA Science blog at Public Library of Science and is a frequent public speaker. Ricki is a strong advocate for the rare disease community, specializing in communication and bringing families together.
JULIE PILCHER began teaching during her graduate training in Biomedical Sciences at Wright State University, Dayton, Ohio. She found, to her surprise, that working as a teaching assistant held her interest more than her research. Upon completion of her Ph.D. in 1986, she embarked on her teaching career, working for many years as an adjunct in a variety of schools as she raised her four children. In 1998, she began full-time at the University of Southern Indiana, Evansville. Her work with McGraw-Hill began several years ago, doing reviews of textbook chapters and lab manuals. More recently, she has been involved in content development for LearnSmart. In her A&P course at USI, she has also used Connect and has enjoyed the challenge of writing some of her own assignments. When the opportunity arose to become more involved in the authoring of digital content for McGraw-Hill, she could not pass it up. Based on her own experience, students are using more and more online resources, and she is pleased to be part of that aspect of A&P education.
NEW TO THIS EDITION
Global Changes
Learning Outline
Learning Outcomes
Brief chapter outline at the beginning of each chapter
Learning Outcomes now follow each major section heading. Glossary Many definitions updated
Specific Changes At-a-Glance Chapter Topic
1 Scientific method Chapter 1 introduces and revised Appendix B expands coverage
1 Body fluid compartments Clearer connection between the extracellular fluid and the internal environment
1 Homeostasis Clearer connection between the external environment and the outside world
1 Clinical Application 1.1 Figure orientations now correspond to each other
1 Abdominal regions Figure 1.17 redone with model
2 Proteins Levels of protein structure section rewritten
2 Atomic structure Rewritten section on relationship between atoms and ions
2 Lipids Terminology—“triglyceride” used preferentially to “fat”
3 Golgi apparatus
Figure 3.5 new micrograph with improved contrast
3 Centrioles Figure 3.8 new micrograph with improved contrast
3 Nucleus Figure 3.10 new micrograph with improved contrast
3 Diffusion Figures 3.11 and 3.12 have better contrast
3 Facilitated diffusion Figure 3.14 has better contrast
3 Organelles Vesicles moved up in discussion to more realistically parallel activities within cells
4 Lipid terminology Figures 4.2 and 4.10, “triglyceride” is predominant term, with “fat” in parentheses
4 Energy Figure 4.9 total ATP equals 28, to be more consistent with recent calculations
5 Epithelial tissues Labels in figs. 5.4 and 5.5 have been changed to clarify that microvilli and cilia are on the free surface of the tissues
5 Connective tissue cells Figures 5.16 and 5.17 are new micrographs of a macrophage engulfing a cell and a mast cell, respectively
5 Adipose tissue A blood vessel has been identified in fig. 5.20
6 Melanocyte New micrograph in fig. 6.3a labeling melanosomes containing melanin
6 Clinical Application 6.1 Photograph of squamous cell carcinoma added to fig. 6A
6 Fingernails Figure 6.4 redrawn to extend finger and show the detail of the joint between two phalanges
6 Skin functions All of the skin functions are now under one major heading; 6.4 Skin Functions
7 Microscopic structure of bone Added lamellae to the discussion
7 Ossification Bold faced term moved to the introduction of the discussion of intramembranous and endochondral bone formation
7 Levers and movement Discussion moved to chapter 8
7 Figures revised Figure 7.13 has more detail added to the line art, figure 7.17 locator icon colored to match the a, b, c portion titles, figure 7.23 the leader for the anatomical neck ends in a circle surrounding the neck, figure 7.27 labels added for the medial and lateral surfaces
7 Pelvic outlet Added to the discussion of the pelvis
7 Movements Abduction, adduction, rotation, and pronation rewritten for clarification
8 Muscle structure Figure 8.1 redrawn to better show the relationship among epimysium, perimysium, and endomysium
8 Connective tissue coverings Section rewritten for clarity
8 Skeletal muscle fibers
Section on striations rewritten for clarity
8 Neuromuscular junction Section rewritten for clarity
NEW TO THIS EDITION
8 Creatine phosphate
Figure 8.9 revised—cells eliminated for accuracy and clarity
8 Oxygen supply and aerobic reactions Figure 8.10 revised—ATP from citric acid cycle added
8 Oxygen debt and muscle fatigue
8 Summation
8 Smooth muscle
8 Body movement
8 Major skeletal muscles
ATP yield from cellular respiration updated
Clarification on the role of partial tetanic contractions
Section revised and terminology replaces smooth muscle “fibers” with smooth muscle “cells”
Figure 8.14 supports the discussion of levers, now moved to this chapter
Paragraph added to clarify appropriate use of technical terms as opposed to popular terms
8 Tables describing muscle, Revised for accuracy and use of correct anatomical terminology origin, insertion, and action
8 Muscles that move the head
Ligamentum nuchae added to discussion and to figure 8.18
8 Muscle illustrations Figures redrawn throughout
8 Muscles that move the thigh Text reorganized for clarity
9 Neural pathways
9 Introduction
9 Neuroglia
Term replaces “nerve pathways”
Discussion of the synapse moved to earlier in the section
Section on blood-brain barrier rewritten for clarity
9 Resting potential and action potentials Sections rewritten for clarity
9 Impulse conduction
9 Removal of neurotransmitter
Clarification of role of Schwann cells in PNS and oligodendrocytes in CNS
Section reorganized for clarity
9 Facilitation Mechanism updated
9 Sensory, motor, and mixed nerves
9 Spinal cord
9 Tracts
9 Brain
10 Pain
10 Pain pathways
10 Spiral organ
10 Iris
11 Target cells
11 Pituitary hormones
11 Thyroid hormones
11 Pineal gland
12 Vignette
12 Blood volume
12 Blood cell formation
12 Albumins in plasma
12 Edema box
12 Vascular spasm
13 Heart transplantation box
13 ECG
13 Blood vessels micrographs
13 Arterial blood pressure
14 Vignette
14 MALT
14 Thymus
14 Lymphocyte activation
Description rewritten for clarity
Figure 9.24 redrawn to better show structure of cauda equina and dura
Figures 9.26 and 9.27 redrawn to more clearly show neural pathways
Figure 9.28 revised
Section rewritten in terms of fast and slow pain fibers
Central destinations of pain fibers rewritten
Figure 10.9 has improved drawings of innervation
Discussion includes pupillary dilators and pupillary constrictors
Figure 11.1 redrawn to emphasize that hormones reach all cells, but only target cells respond
Clarification regarding why secretions from hypothalamic neurons reaching the posterior pituitary are considered hormones
Section rewritten
Section on melatonin rewritten
Updated to be more current
Rewritten to indicate the values for males and females
Figure 12.4 the late erythroblast redrawn for clarification
Rewritten to emphasize their role in colloid osmotic pressure
Rewritten for clarification
Wording changed from blood vessel spasm to vascular spasm and rewritten for clarification
Updated paragraph on LVADs
Replaced figure 13.14 a and labeled all of the waves on figure 13.14b
Replaced figures 13.20 and 13.22
Rewritten to indicate that normal is no greater than 119/79
Rewritten to update and clarify
Discussion rewritten for clarification
Figure 14.9a redrawn to better illustrate the size of the thymus
Figure 14.14 revised with numbers added to clarify step sequence
Specific Changes
14 Allergic reactions
Section rewritten and title changed from allergic reactions to hypersensitivity to clarify that allergic reactions are just one type of hypersensitivity reaction
14 Immunosuppressive drugs Rewritten to update
15 Vignette Updated the discussion of fecal microbiota transplantation
15 Stomach Rewritten discussion of parts to clarify the pylorus
15 Pancreas Pancreatic duct portion rewritten to clarify
15 Gallbladder radiograph Figure 15.20 replaced
15 Triglyceride absorption Figure 15.26 revised to reflect the use of the term triglycerides (instead of fats) in the rewritten discussion
15 Colonoscopy box Added the alternative stool sample method to update
16 Organs of the respiratory system New discussion on bronchoconstriction and bronchodilation
16 Inspiration Text reworked for clarity with new examples of pressure gradients
16 Respiratory volumes and capacities New box with tidal volume analogy
16 Gas transport Improved description of histotoxic hypoxia
17 Location of the kidneys Figure 17.1 redrawn, vertebrae labeled as markers
17 Kidney structure Redrawn figure 17.3
17 Nephrons Redrawn diagrammatic part of figure 17.6
17 Glomerular filtration Clearer distinction between glomerular filtrate and tubular fluid
17 Urine formation Figure 17.9 redrawn in more diagrammatic fashion for clarity
17 Tubular reabsorption and Figures 17.14 and 17.15 updated for accuracy and clarity tubular secretion
18 Vignette Updated
18 Figure revisions Figures 18.4, 18.5, and 18.14 revised for clarification
18 Clinical Application 18.1 Rewritten water intoxication for clarification
18 Electrolyte balance Reworded to emphasize keeping ions in appropriate concentrations within the plasma and interstitial fluid
18 Acidosis and alkalosis Discussions reorganized to describe the symptoms first, followed by the causes
19 Figures revised Figures 19.2, 19.4, 19.7, and 19.13 revised for changes in terminology and accuracy
19 Oogenesis Rewritten for clarification
19 Follicle maturation Figure 19.9 revised with the addition of locator icons for the developing follicle
19 Carcinoma in situ box Updated
19 Reproductive cycle and ovulation Rewritten to emphasize LH acting with FSH to induce complex interactions, adding accuracy but not detail
19 Birth control Figure 19.16 revised and the text discussion rewritten to reflect methods currently in use
20 Vignette Rewritten for clarification
20 Sperm cells on oocyte Figure 20.1 micrograph replaced
20 Figures revised Figures 20.3, 20.5, and 20.10 revised for clarification
20 Chapter reorganized Pregnancy and the Prenatal Period section includes a changed sequence for flow in the Embryonic Stage (Period of Cleavage, Extraembryonic Membrane Formation, Gastrulation and Organogenesis), the Fetal Stage, Fetal Blood and Circulation, Maternal Changes During Pregnancy, Birth Process, and Milk Production and Secretion
20 Genetics Connection 20.1 Figure 20C revised for clarification
20 Multifactorial traits Figure 20.20 replaced with a more current figure
20 New box Added to distinguish the difference between genetic disease and inherited disease
DYNAMIC ART PROGRAM
Art is vibrant, three-dimensional, and instructional. The authors examined every piece to ensure it was engaging and accurate. The thirteenth edition’s art program will help students understand the key concepts of anatomy and physiology.
(a)
Realistic, three-dimensional figures provide depth and orientation.
Line art for micrographs is three-dimensional to help students visualize more than just the flat microscopic sample.
This longitudinal section shows the interior structures of a muscle fiber revealing detail of the myofibrils, and thick and thin filaments.
Thoracic cavity
Abdominopelvic cavity
Abdominal cavity Diaphragm
Pelvic cavity
Cranial cavity
Vertebral canal
Nucleus
Sarcoplasmic reticulum
Openings into transverse tubules Transverse tubule
Mitochondria
Sarcolemma Sarcoplasm
Nucleus
Cisternae of sarcoplasmic reticulum Transverse tubule
Myofibrils
Colors readily distinguish functional areas.
1
2 The hormone combines with a protein receptor, usually in
3 The hormone-receptor complex activates synthesis of specific messenger RNA (mRNA) molecules
4 The mRNA molecules leave the nucleus and enter the cytoplasm
5 Translation of mRNA molecules leads to synthesis of the encoded proteins associated with the hormone’s action
The explanation is part of the figure, not lost in the legend.
Locator icons help portray the process more accurately.
Learn, Practice, Assess!
Learn
Learning Outcomes have been moved! They now follow the appropriate heading within the chapter. They continue to be closely linked to Chapter Assessments and Integrative Assessments/Critical Thinking questions found at the end of each chapter.
Learning tools to help you succeed
. . .
Muscular actions also provide muscle tone, propel body fluids and food, generate the heartbeat, and distribute heat. Muscle is of three types—skeletal muscle, smooth muscle, and cardiac muscle, as described in section 5.5, Muscle Tissues. This chapter focuses mostly on skeletal muscle, which attaches to bones and is under conscious control. Smooth muscle and cardiac muscle are discussed briefly.
8.2 | Structure of a Skeletal Muscle
LEARN
2. Identify the structures that make up a skeletal muscle.
Confirming Pages
3. Identify the major parts of a skeletal muscle fiber, and the function of each.
4. Discuss nervous stimulation of a skeletal muscle.
A skeletal muscle is an organ of the muscular system. It is composed of skeletal muscle tissue, nervous tissue, blood, and other connective tissues.
Check out the Chapter Preview, Foundations for Success, on page 1. The Chapter Preview was specifically designed to help you LEARN how to study. It provides helpful study tips.
1.6 | Organization of the Human Body LEARN
9. Identify the locations of the major body cavities.
10. List the organs located in each major body cavity.
The forty-eight-year-old basketball the gym shot. now the In hospital, scan, ligament and doesn’t twice works exercises
Thoracic and Abdominopelvic Membranes
Connective Tissue Coverings
Vignettes lead into chapter content. They connect you to many areas of health care including technology, physiology, medical conditions, historical perspectives, and careers.
11. Name and identify the locations of the membranes associated with the thoracic and abdominopelvic cavities.
12. Name the major organ systems, and list the organs associated with each.
13. Describe the general functions of each organ system.
Parietal [pah-ri′ĕ -tal] refers to a membrane attached to the wall of a cavity; visceral [vis′er-al] refers to a membrane that is deeper—toward the interior—and covers an internal organ, such as a lung. Within the thoracic cavity, the compartments that contain the lungs, on either side of the mediastinum, are lined with a membrane called the parietal pleura (fig. 1.11). A similar membrane, called the visceral pleura , covers each lung.
Anatomy & Physiology REVEALED® (APR) icon at the beginning of each chapter tells you which system in APR applies to this chapter.
The human organism is a complex structure composed of many parts. Its major features include several body cavities, layers of membranes within these cavities, and a variety of organ systems.
Body Cavities
The human organism can be divided into an axial (ak′se-al) portion, which includes the head, neck, and trunk, and an appendicular (ap′′en-dik′u-lar) portion, which includes the upper and lower limbs. Within the axial portion are the cranial cavity, which houses the brain; the vertebral canal, which contains the spinal cord within the sections of the backbone (vertebrae); the thoracic (tho-ras′ik) cavity; and the abdominopelvic (ab-dom′′ĭ-no-pel′vik) cavity. The organs within these last two cavities are called viscera (vis′er-ah) (fig. 1.9a).
Practice
Layers of connective tissue enclose and separate all parts of a skeletal muscle. Dense connective tissue called fascia (fash′e-ah) separates an individual skeletal muscle from adjacent muscles and holds it in position (fig. 8.1). Fascia blends with the epimysium (ep″i-mis′e-um), a layer of connective tissue that closely surrounds each skeletal muscle (fig. 8.1). Other layers of connective tissue, called perimysium (per″i-mis′e-um), extend inward from the epimysium and separate the muscle tissue into small sections called fascicles (fas′ı˘-k’lz). Fascicles are bundles of skeletal muscle fibers. Each muscle fiber within a fascicle lies within a layer of ro′sez),
The parietal and visceral pleural membranes (ploo′ral mem′brā nz) are separated only by a thin film of watery fluid (serous fluid), which they secrete. Although no actual space normally exists between these membranes, the potential space between them is called the pleural cavity (see figs. 1.9b and 1.11).
Aids to Understanding Words examines root words, stems, prefixes, suffixes, and pronunciations to help you build a solid anatomy and physiology vocabulary.
shi77364_ch08_188-222.indd 189
The heart, which is located in the broadest portion of the mediastinum, is surrounded by pericardial (per′′ĭ-kar′de-al) membranes. A visceral pericardium covers the heart’s surface and is separated from a parietal pericardium by a small volume of fluid. The pericardial cavity (see figs. 1.9b and 1.11) is the potential space between these membranes.
Reference Plates offer vibrant detail of body structures.
A broad, thin skeletal (voluntary) muscle called the diaphragm separates the thoracic cavity from the abdominopelvic cavity. The thoracic cavity wall is composed of skin, skeletal muscles, and various bones.
Practice with a question or series of questions after major sections. They will test your understanding of the material.
A compartment called the mediastinum (me′′de-asti′num) forms a boundary between the right and left sides of the thoracic cavity. The mediastinum contains most of the thoracic cavity viscera (including the heart, esophagus, trachea, and thymus) except for the lungs. The right and left lungs are on either side of the mediastinum (fig. 1.9b).
Interesting applications help you practice and apply knowledge . . .
The abdominopelvic cavity, which includes an upper abdominal portion and a lower pelvic portion, extends from the diaphragm to the floor of the pelvis. Its wall consists primarily of skin, skeletal muscles, and bones. The viscera within the abdominal cavity include the stomach, liver, spleen, gallbladder, kidneys, and most of the small and large intestines.
Figure Questions allow an additional assessment. Found on key figures throughout the chapter.
The pelvic cavity is the portion of the abdominopelvic cavity enclosed by the hip bones (see section 7.11, Pelvic Girdle). It contains the terminal portion of the large intestine, the urinary bladder, and the internal reproductive organs.
Smaller cavities within the head include (fig. 1.10):
1. Oral cavity, containing the teeth and tongue.
2.
In the abdominopelvic cavity, the membranes are called peritoneal (per′′ĭ-to-ne′al) membranes. A parietal peritoneum lines the wall, and a visceral peritoneum covers each organ in the abdominal cavity (fig. 1.12). The peritoneal cavity is the potential space between these membranes.
PRACTICE
13. Which organ occupies the cranial cavity? the vertebral canal?
14. What does viscera mean?
15. Name the cavities of the head.
16. Describe the membranes associated with the thoracic and abdominopelvic cavities.
Organ Systems
Answer can be found in Appendix F. Q
How does acetylcholine released into the synaptic cleft reach the muscle fiber membrane?
A human body consists of several organ systems. Each system includes a set of interrelated organs that work together to provide specialized functions that contribute to homeostasis (fig. 1.13). As you read about each system, you may want to consult the illustrations of the human torso in the Reference Plates (see Reference Plates—The Human Organism, at the end of Chapter 1) and locate some of the organs described. The following introduction to the organ systems
The therapist, a single-leg muscles deep muscles her patient builds the hurt A two-year exam. facilities, workplaces.
end. Many of these molecules ment. An actin molecule ing site to which the molecules twist into filament. The proteins part of the thin filament
The sarcomere is etal muscles because muscle can be described sarcomeres within its ens the sarcomeres on the thin filaments. binding site, forming ing on the actin filament. straighten, combine the actin filament, and The sliding filament includes all of these for how the sarcomeres not change length. Rather, the thin filaments moving mere from both ends
The myosin heads catalyzes the breakdown (see section 4.4, Energy tion provides energy a “cocked” position, part of a spring-operated in this position until When this happens bridge pulls on the thin myosin breaks the
Boxed information expands on the concepts discussed in the text.
In tendinitis, a tendon (the attachment of a muscle to a bone) becomes painfully inflamed and swollen following injury or the repeated stress of athletic activity. If rest, physical therapy, and anti-inflammatory drugs do not alleviate tendinitis, then ultrasound can be applied to break up scar tissue. In tenosynovitis, the connective tissue sheath of the tendon (the tenosynovium) is inflamed. The tendons most commonly affected are those associated with the joint capsules of the shoulder, elbow, and hip and those that move the hand, thigh, and foot.
Skeletal Muscle Fibers
A skeletal muscle fiber is a single cell that contracts (exerts a pulling force) in response to stimulation and then relaxes when the stimulation ends. Each skeletal muscle fiber is a
Facts of Life provides interesting bits of anatomy and physiology information, adding a touch of wonder to chapter topics.
long, thin, cylinder with rounded ends. It may extend the full length of the muscle. Just beneath its cell membrane (or sarcolemma), the cytoplasm (or sarcoplasm) of the fiber has many small, oval nuclei and mitochondria (fig. 8.1). The sarcoplasm also contains many threadlike myofibrils (mi′′o-fi′brilz) that lie parallel to one another.
FACTS OF LIFE The skeleton of an average 160-pound body weighs about 29 pounds.
Myofibrils play a fundamental role in muscle contraction. They consist of two kinds of protein filaments (myofilaments)—thick filaments composed of the protein myosin (mi′o-sin) and thin filaments composed mainly of the protein actin (ak′tin) (fig. 8.2). (Two other thin filament proteins, troponin and tropomyosin, are discussed later in section 8.3, Skeletal Muscle Contraction.) The organization of these filaments produces the characteristic alternating light and dark striations, or bands, of a skeletal muscle fiber.
Clinical Applications present disorders, physiological responses to environmental factors, and other topics of general interest and applies them to clinical situations.
CLINICAL APPLICATION 18.1
Water Balance Disorders
Dehydration, water intoxication, and edema are among the more common disorders that involve a water imbalance in body fluids.
Dehydration
In dehydration, water output exceeds water intake.
Dehydration may develop following excessive sweating or as a result of prolonged water deprivation accompanied by continued water output. The extracellular fluid becomes more concentrated, and water leaves cells by osmosis (Figure 18A). Dehydration may also accompany prolonged vomiting or diarrhea that depletes body fluids.
During dehydration, the skin and mucous membranes of the mouth feel dry, and body weight drops. Severe hyperthermia may develop as the body’s temperature-regulating mechanism falters due to lack of water for sweat production. Infants are more likely to become dehydrated because their kidneys are less efficient at conserving water than those of adults. Elderly people are
Table 7.1 lists the bones of the adult skeleton. Table 7.2 lists terms that describe skeletal structures.
The striations of skeletal muscle result from a repeating pattern of units called sarcomeres (sar′ko-m ĕ rz) within
also especially susceptible to developing water imbalances because the sensitivity of their thirst mechanism decreases with age, and physical disabilities may make it difficult for them to obtain adequate fluids.
The treatment for dehydration is to replace the lost water and electrolytes. If only water is replaced, the extracellular fluid will become more dilute than normal, causing cells to swell (Figure 18B). This may produce a condition called water intoxication.
Water Intoxication
Until recently, runners were advised to drink as much fluid as they could, particularly in long events. But the death of a young woman running in the Boston marathon, following brain swelling, from low blood sodium (hyponatremia) due to excessive water intake leading to water intoxication, inspired further study and a reevaluation of this advice. Researchers from Harvard Medical School studied 488 runners from the marathon and found that 13% of them had developed hyponatremia. The tendency to develop the condition
Confirming
Chapter Assessments check your understanding of the chapter’s learning outcomes.
Integrative Assessments/Critical Thinking questions allow you to connect and apply information from previous chapters as well as information within the current chapter.
Chapter Summary Outlines help you review the chapter’s main ideas.
Summary Outline
1. Role of myosin and actin a. Heads of myosin filaments form cross-bridge linkages with actin filaments.
b.
PRACTICE
13. Distinguish between skeletons.
14. List the bones of the appendicular skeleton.
Genetics Connections explore the molecular underpinnings of familiar as well as not so familiar illnesses. Read about such topics as ion channel disorders, muscular dystrophy, and cystic fibrosis.
V GENETICS CONNECTION 8.1
Inherited Diseases of Muscle
5. Muscles that move the arm
a. These muscles connect the humerus to various regions of the pectoral girdle, ribs, and vertebral column.
Several inherited conditions affect muscle tissue. These disorders differ in the nature of the genetic defect, the type of protein that is abnormal in form or function, and the muscles that are impaired.
b. They include the coracobrachialis, pectoralis major, teres major, latissimus dorsi, supraspinatus, deltoid, subscapularis, infraspinatus, and teres minor.
The Muscular Dystrophies—Missing Proteins
6. Muscles that move the forearm
a. These muscles connect the radius and ulna to the humerus or pectoral girdle.
b. They include the biceps brachii, brachialis, brachioradialis, triceps brachii, supinator, pronator teres, and pronator quadratus.
A muscle cell is packed with filaments of actin and myosin. Much less abundant, but no less important, is a protein called dystrophin. It holds skeletal muscle cells together by linking actin in the cell to glycoproteins in the cell membrane, which helps attach the cell to the extracellular matrix. Missing or abnormal dystrophin or the glycoproteins cause muscular dystrophies.
7. Muscles that move the hand
a. These muscles arise from the distal end of the humerus and from the radius and ulna.
b. They include the flexor carpi radialis, flexor carpi ulnaris, palmaris longus, flexor digitorum profundus, extensor carpi radialis longus, extensor carpi radialis brevis, extensor carpi ulnaris, and extensor digitorum.
8. Muscles of the abdominal wall
a. These muscles connect the rib cage and vertebral column to the pelvic girdle.
b. They include the external oblique, internal oblique, transversus abdominis, and rectus abdominis.
CHAPTER ASSESSMENTS
8.1 Introduction
1. The three types of muscle tissue are and
8.2 Structure of a Skeletal Muscle
2. Describe the difference between a tendon and an aponeurosis.
3. Describe how connective tissue associates with skeletal muscle.
4. List the major parts of a skeletal muscle fiber, and describe the function of each part.
5. Describe a neuromuscular junction.
6. A neurotransmitter
9. Muscles of the pelvic floor a. These muscles form the floor of the pelvic cavity and fill the space within the pubic arch.
b. They include the levator ani, coccygeus, superficial transversus perinei, bulbospongiosus, and ischiocavernosus.
10. Muscles that move the thigh a. These muscles attach to the femur and to some part of the pelvic girdle.
b. They include the psoas major, iliacus, gluteus maximus, gluteus medius, gluteus minimus, tensor fasciae latae, adductor longus, adductor magnus, and gracilis.
11. Muscles that move the leg a. These muscles connect the tibia or fibula to the femur or pelvic girdle.
These illnesses vary in severity and age of onset, but in all cases, muscles weaken and degenerate. Eventually fat and connective tissue replace muscle. Duchenne muscular dystrophy (DMD) is the most severe type of the illness (fig. 8B). Symptoms begin by age five and affect only boys. By age thirteen, the person cannot walk, and by early adulthood he usually dies from failure of the respiratory muscles. In DMD, dystrophin is absent or shortened. In Becker muscular dystrophy, symptoms begin in early adulthood, are less severe, and result from underproduction of dystrophin. An experimental genetic therapy produces nearly full-length dystrophin by skipping over the part of the gene that includes the mutation.
Charcot-Marie-Tooth Disease—A
Duplicate Gene
b. They include the hamstring group (biceps femoris, semitendinosus, semimembranosus), sartorius, and the quadriceps femoris group (rectus femoris, vastus lateralis, vastus medialis, vastus intermedius).
12. Muscles that move the foot a. These muscles attach the femur, tibia, and fibula to bones of the foot.
b. They include the tibialis anterior, fibularis tertius, extensor digitorum longus, gastrocnemius, soleus, flexor digitorum longus, tibialis posterior, fibularis longus, and fibularis brevis.
Charcot-Marie-Tooth disease causes a slowly progressing weakness in the muscles of the hands and feet and a decrease in tendon reflexes in these parts. In this illness, an extra gene impairs the insulating sheath around affected nerve cells, so that nerve cells cannot adequately stimulate muscles. Physicians perform two tests—electromyography and nerve conduction velocity—to diagnose Charcot-Marie-Tooth disease. It is also possible to test for gene mutations to confirm a diagnosis based on symptoms.
14. Sketch a myogram of a single muscular twitch, and identify the latent period, period of contraction, and period of relaxation.
15. Define motor unit.
16. Which of the following describes the addition of muscle fibers to take part in a contraction? a. summation b. recruitment c. tetany d. twitch
17. Explain how skeletal muscle stimulation produces a sustained contraction.
This very rare inherited form of heart failure usually begins in a person’s forties and is lethal in 50% of cases within five years of diagnosis, unless a heart transplant can be performed. The condition is caused by a mutation in a gene that encodes a form of actin found only in cardiac muscle. The mutation disturbs actin’s ability to anchor to the Z lines in heart muscle cells, preventing actin from effectively transferring the force of contraction. As a result, the heart chambers enlarge and eventually fail.
18. Distinguish between tetanic contraction and muscle tone.
8.5 Smooth Muscle
19. Distinguish between multiunit and visceral smooth muscle cells.
One end of a skeletal muscle usually attaches to a relatively immovable or fixed part on one side of a movable joint, and the other end attaches to a movable part on the other side of that joint, such that the muscle crosses the joint. The less movable end of the muscle is called its origin (or′ĭ-jin), and the more movable end is its insertion (in-ser′shun). When a muscle contracts, its insertion is pulled toward its origin.
20. Compare smooth and skeletal muscle contractions.
8.6 Cardiac Muscle
21. Make a table comparing contraction mechanisms of cardiac and skeletal muscle.
8.7 Skeletal Muscle Actions
in the name biceps, which means “two heads.” (Note: The head of a muscle is the part nearest its origin.) One head of biceps brachii attaches to the coracoid process of the scapula, and the other head arises from a tubercle above the glenoid cavity of the scapula. The muscle runs along the anterior surface of the humerus and is inserted by means of a on the radial tuberosity of the radius. When biceps
22. Distinguish between a muscle’s origin and its insertion.
12. Explain how skeletal muscle function affects the maintenance of body temperature.
23. Define agonist, antagonist, and synergist.
Figure 7.8 Major bones of the skeleton. (a) Anterior view. (b) Posterior view. The axial portion appendicular portions are shown in yellow.
Figure 8.1 A skeletal muscle is composed of a variety of tissues, including layers of connective tissue. Fascia covers the surface of the muscle, epimysium lies beneath the fascia, and perimysium extends into the structure of the muscle where it groups muscle cells into fascicles. Endomysium separates individual muscle fibers within fascicles.
8.3
Vertebral column
Carpals
Metacarpals
Confirming
CHAPTER
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SEAMLESS DIGITAL & PRINT EXPERIENCE!
In this edition of Hole’s Essentials of Human Anatomy & Physiology, the digital author team of Leslie Day and Julie Pilcher worked hand-in-hand with the print author team to deliver a seamless experience for instructors and students.
The digital authors make sure there is a variety of questions with different Bloom’s Taxonomy levels. In this edition, we have increased the number of questions that are higher level Bloom’s to 30 percent.
Leslie and Julie ensure that there is an appropriate number of questions for each learning outcome in the chapter. They tagged questions to textbook learning outcomes and to the Human Anatomy & Physiology Society (HAPS) learning outcomes. This makes it easy for instructors to find questions to assign in their course.
McGraw-Hill Connect® gives the instructor access to additional course-wide material for A&P. Instructors can access questions for Anatomy & Physiology REVEALED ®, a variety of animations, diagnostic exam for LearnSmart Prep®, concept application questions, and supplemental laboratory questions.
For a detailed list of updates made to the digital resources, please contact your Learning Technology Representative.
Laboratory Manual for Hole’s Essentials of Human Anatomy & Physiology, Thirteenth Edition, by Terry R. Martin, Kishwaukee College, is designed to accompany the thirteenth edition of Hole’s Essentials of Human Anatomy & Physiology.
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ACKNOWLEDGMENTS
A special thanks also to the following individuals who assisted with ancillary development:
Janet Brodsky, Ivy Tech Community College; William "Mike" Clark, Lone Star College Kingwood; Pam Gregory, Tyler Junior College; Delon Washo-Krupps, Arizona State University; and Chuck Welsh, Duquesne University
Any textbook is the result of hard work by a large team. Although we directed the revision, many “behind-the-scenes” people at McGraw-Hill were indispensable to the project. We would like to thank our editorial team of Amy Reed, Chloe Bouxsein, and Fran Simon; Jim Connely and Kelly Brown, marketing managers; our production team, which included Jayne Klein, Sandy Ludovissy, Tara McDermott, Lori Hancock, and Christina Nelson. We would also like to thank copyeditor Wendy Nelson, and most of all, John Hole, for giving us the opportunity and freedom to continue his classic work. We also thank our wonderfully patient families for their support.
A NOTE FROM THE AUTHORS
To the Student
David Shier
Jackie Butler
Ricki Lewis
Welcome! As you read this (with your eyes) and understand it (with your brain), perhaps turning to the next page (with muscle actions of your fingers, hand, forearm, and arm), you are using the human body to do so. Indeed, some of you may be using your fingers, hand, forearm, and arm to read through the eBook on your computer, tablet, or smartphone. Whether you use traditional or new technology, the thirteenth edition of Hole’s Essentials of Human Anatomy & Physiology offers an interesting and readable introduction to how the human body accomplishes these tasks. The functioning of the body is not simple, and at times understanding may not seem easy, but learning how the body works is always fascinating and can be both useful and fun!
Many of you are on a path toward a career in health care, athletics, science, or education. Be sure to check out the Career Corner in every chapter. They present interesting options for future careers. Balancing family, work, and academics is challenging, but try to look at this course not as a hurdle along your way but as a stepping stone. We have written this book to help you succeed in your coursework and to help prepare you to make that journey to a successful and rewarding career.
To the Teacher
With this edition of Hole’s Essentials of Human Anatomy & Physiology, Leslie Day and Julie Pilcher are continuing to develop LearnSmart and Connect and fully integrating them with the Hole’s content. We are extremely excited that Hole’s is keeping pace with the ever-changing array of technologies available to support teaching and learning.
The Learn, Practice, Assess approach continues with this thirteenth edition. Each chapter opens with Learning Outcomes, contains many opportunities to Practice throughout, and closes with Assessments that are closely tied to the Learning Outcomes. Students can use this feature not only to focus their study efforts, but also to take an active role in monitoring their own progress toward mastering the material. All of these resources are described in more detail in the Chapter Preview/ Foundations for Success beginning on page 1.
David Shier, Jackie Butler, Ricki Lewis, Leslie Day, and Julie Pilcher
CHAPTER PREVIEW
Foundations for Success 1
P.1 Introduction 2
P.2 Strategies for Your Success 2
1 | Introduction to Human Anatomy and Physiology 9
1.1 Introduction 10
1.2 Anatomy and Physiology 11
1.3 Levels of Organization 12
1.4 Characteristics of Life 13
1.5 Maintenance of Life 13
1.6 Organization of the Human Body 16
1.7 Anatomical Terminology 22
REFERENCE PLATES THE HUMAN ORGANISM 31
2 | Chemical Basis of Life 39
2.1 Introduction 40
2.2 Structure of Matter 40
2.3 Chemical Constituents of Cells 49
3 | Cells 60
3.1 Introduction 61
3.2 Composite Cell 61
3.3 Movements Into and Out of the Cell 71
3.4 The Cell Cycle 78
4 | Cellular Metabolism 86
4.1 Introduction 87 4.2 Metabolic Reactions 87 4.3 Control of Metabolic Reactions 88
The Chapter Preview not only provides great study tips to offer a foundation for success, but it also offers tips on how to utilize this particular text. Those tips will be found in boxes just like this.
instructor is saying. Gradually the lecture fades as you become aware of your own breathing, the beating of your heart, and the sweat that breaks out on your forehead in response to the radiant heat from the glorious day. Suddenly your reverie is cut short—a classmate has dropped a human anatomy and physiology textbook on the floor. You jump. Your heart hammers and a flash of fear grips your chest, but you soon realize what has happened and recover.
AN OPENING VIGNETTE discusses current events or research news relating to the subject matter in the chapter. These vignettes apply the concepts learned in the study of anatomy and physiology.
Pay attention. It is a beautiful day. You can’t help but stare wistfully out the window, the scent of spring blooms and sound of birds making it impossible to concentrate on what the
LEARNING OUTLINE
P.1 Introduction
P.2 Strategies for Your Success
The message is clear: pay attention. So you do, tuning out the great outdoors and focusing on the class. In this course, you will learn all about the events that you have just experienced, including your response to the sudden stimulation. This is a good reason to stay focused.
After studying this chapter, you should be able to complete the “Learning Outcomes” that follow the major headings throughout the chapter.
Each chapter has a learning outline introducing what will be discussed in the chapter.
This digital tool, as indicated below and with the APR icons within the chapters, allows you to explore the human body in depth through simulated dissection of cadavers and histology preparations. It also offers animations on chapter concepts.
A photo on the opening page for each chapter generates interest.
The section below introduces building blocks of words that your instructor may assign. Learning them is a good investment of your time, because they can be used over and over and apply to many of the terms you will use in your career. Appendix A has a comprehensive list of these prefixes, suffixes, and root words.
AIDS TO UNDERSTANDING WORDS
ana- [up] anatomy: the study of breaking up the body into its parts.
(Appendix A has a complete list of Aids to Understanding Words.)
multi- [many] multitasking: performing several tasks simultaneously.
Major divisions within a chapter are called “A-heads.” They are numbered sequentially and entitled with very large, blue type to designate major content areas.
P.1 | Introduction
After each A-Head is a list of learning outcomes indicating the knowledge you should gain as you work through the section. (Note the blue learn arrow preceding the “LEARN” heading.) These outcomes are intended to help you master the similar outcomes set by your instructor. The outcomes are tied directly to assessments of knowledge gained.
LEARN
1. Explain the importance of an individualized approach to learning.
Studying the human body can be overwhelming at times. The new terminology, used to describe body parts and how they work, can make it seem as if you are studying a foreign language. Learning all the parts of the body, along with the composition of each part, and how each part fits with the other parts to make the whole requires memorization. Understanding the way each body part works individually, as well as body parts working together, requires a higher level of knowledge, comprehension, and application. Identifying underlying structural similarities, from the macroscopic to the microscopic levels of body organization, taps more subtle critical thinking skills. This chapter will catalyze success in this active process of learning. (Remember that although the skills and tips discussed in this chapter relate to learning anatomy and physiology, they can be applied to other subjects.)
Learning occurs in different ways or modes. Most students use several modes (multimodal), but are more comfortable and use more effectively one or two, often referred to as learning styles. Some students prefer to read the written word to remember it and the concept it describes or to actually write the words; others learn best by looking at visual representations, such as photographs and drawings.
physio- [relationship to nature] physiology: the study of how body parts function.
Still others learn most effectively by hearing the information or explaining it to someone else. For some learners, true understanding remains elusive until a principle is revealed in a laboratory or clinical setting that provides a memorable context and engages all of the senses. This text accommodates the range of learning styles. Read-write learners will appreciate the lists, definitions (glossary), and tables. Visual learners will discover many diagrams, flow charts, and figures, all with consistent and purposeful use of color. For example, a particular bone is always the same color in figures where bones are color coded. Auditory learners will find pronunciations for new scientific terms to help sound them out, and kinesthetic learners can relate real-life examples and applications to their own activities.
After each major section, a question or series of questions tests your understanding of the material and enables you to practice using the new information. (Note the green practice arrow preceding the “PRACTICE” heading.) If you cannot answer the question(s), you should reread that section, being on the lookout for the answer(s).
PRACTICE
1. List some difficulties a student may experience when studying the human body.
2. Describe the ways people learn.
P.2 | Strategies for Your Success
LEARN
2. Summarize what you should do before attending class.
3. Identify student activities that enhance classroom experience.
4. List and describe several study techniques that can facilitate learning new material.
Many strategies for academic success are common sense, but it might help to review them. You may encounter new and helpful methods of learning.
The major divisions are subdivided into “B-heads,” which are identified by large, black type. These will help you organize the concepts upon which the major divisions are built.
As you read, you may feel the need for a “study break” or to “chill out.” At other times you may just need to shift gears. Try the following: Look for the shaded boxes throughout the book that present sidelights to the main focus of the text. Some of these may cover topics that your instructor chooses to highlight. Read them! They are interesting, informative, and a change of pace.
FACTS OF LIFE
The skeleton of an average 160-pound person contributes about 29 pounds total body weight.
Before Class
Before attending class, prepare by reading and outlining or taking notes on the assigned pages of the text. If outlining, leave adequate space between entries to allow room for note-taking during lectures. Or fold each page of notes taken before class in half so that class notes can be written on the blank side of the paper across from the reading notes on the same topic. This strategy introduces the topics of the next class discussion, as well as new terms. Some students team a vocabulary list with each chapter’s notes. Take the notes from the reading to class and expand them. At a minimum, the student should at least skim the text, reading the A-heads and B-heads and the summary outline to become acquainted with the topics and vocabulary before class.
Factors Affecting Synaptic Transmission
Many chemicals affect synaptic transmission. A drug called Dilantin (diphenylhydantoin) treats seizure disorders by blocking gated sodium channels, thereby limiting the frequency of action potentials reaching the axon terminal. Caffeine in coffee, tea, cola, and energy drinks stimulates nervous system activity by lowering the thresholds at synapses. As a result, postsynaptic neurons are more easily excited. Antidepressants called “selective serotonin reuptake inhibitors” keep the neurotransmitter serotonin in synapses longer, compensating for a still little-understood decreased serotonin release that presumably causes depression.
Health-care workers repeatedly monitor patients’ vital signs —observable body functions that reflect essential metabolic activities. Vital signs indicate that a person is alive. Assessment of vital signs includes measuring body temperature and blood pressure and monitoring heart rate and breathing movements. Absence of vital signs may signify death. A person who has died displays no spontaneous muscular movements, including those of the breathing muscles and beating heart. A dead person does not respond to stimuli and has no reflexes, such as the knee-jerk reflex and the pupillary reflexes of the eye. Brain waves cease with death, as demonstrated by a flat electroencephalogram (EEG), which signifies a lack of electrical activity in the brain.
CAREER CORNER Massage Therapist
The woman feels something give way in her left knee as she lands from a jump in her dance class. She limps away between her classmates, in great pain. At home, she uses “RICE”—rest, ice, compression, elevation—then has a friend take her to an urgent care clinic, where a physician diagnoses patellar tendinitis, or “jumper’s knee.” Frequent jumping followed by lateral movements caused the injury.
Many students who use this book and take various other courses in the health sciences are preparing for careers in health care. Some students may be undecided as to a specific area or specialty. The Career Corner feature presents a description of a particular career choice with each chapter. If it doesn’t describe a career that you seek, perhaps it will give you a better sense of what some of your coworkers and colleagues do!
Three days later, at her weekly appointment with a massage therapist for stress relief, the woman mentions the injury. Over the next few weeks, the massage therapist applies light pressure to the injured area to stimulate circulation, and applies friction in a transverse pattern to break up scar tissue and relax the muscles. She also massages the muscles to improve flexibility.
A massage therapist manipulates soft tissues, using combinations of stroking, kneading, compressing, and vibrating, to relieve pain and reduce stress. Training includes 300 to 1,000 hours of class time, hands-on practice, and continuing education. Specialties include pediatrics, sports injuries, and even applying massage techniques to racehorses.
Cystic Fibrosis
Many young children with this disease who cannot pronounce its name call it “65 Roses.” Cystic fibrosis (CF) is an inherited defect in the ion channels that control chloride movement out of cells in certain organs. In the lungs, thick, sticky mucus accumulates and creates an environment hospitable to certain bacteria that are not common in healthy lungs. A mucus-clogged pancreas prevents digestive secretions from reaching the intestines, impairing nutrient digestion and absorption. A child with CF has trouble breathing and maintaining weight.
CF is inherited from two carrier parents, and affects about 30,000 people in the United States and about 70,000 worldwide. Many others may have milder cases, with recurrent respiratory infections. More than 2,000 mutations have been recognized in the cystic fibrosis transmembrane regulator (CFTR ) gene, which encodes the chloride channel protein. Today fetuses and newborns with CF are diagnosed using genetic tests, but years ago the first signs were typically “failure to thrive,” salty sweat, and foul-smelling stools. When CF was recognized in 1938, life expectancy was only five years, but today median survival is about age fifty, with many patients living longer, thanks to
drug treatments. Inhaled antibiotics control the respiratory infections, and daily “bronchial drainage” exercises shake stifling mucus from the lungs. A vibrating vest worn for half-hour periods two to four times a day also loosens mucus. Digestive enzymes mixed into soft foods enhance nutrient absorption, although some patients require feeding tubes.
Discovery of the most common CFTR mutation in 1989 enabled development of more-targeted treatments. Thirty drugs are now in development. The new drugs work in various ways: correcting misfolded CFTR protein, restoring liquid on airway surfaces, breaking up mucus, improving nutrition, and fighting inflammation and infection.
Life with severe CF is challenging. In summertime, a child must avoid water from hoses, which harbor lung-loving Pseudomonas bacteria. Cookouts spew lung-irritating particulates. Too much chlorine in pools irritates lungs, whereas too little invites bacterial infection. New infections arise, too. In the past few years, multidrug-resistant Mycobacterium abscessus, related to the pathogen that causes tuberculosis, has affected 3% to 10% of CF patients in the United States and Europe.
Remember when you were very young and were presented with a substantial book for the first time? You were likely intimidated by its length but were reassured that it contained “a lot of pictures.” This book has many “pictures” (figures) too, all designed to help you master the material. Some of the figure legends are followed by a question pertaining to that figure, intended to rein
force a concept or usage of terminology.
Photographs and Line Art
Photographs provide a realistic view of anatomy.
Line art can present different positions, layers, or perspectives.
Crista
Macroscopic to Microscopic
Many figures show anatomical structures in a manner that is macroscopic to microscopic (or vice versa).
Flow Charts
Flow charts depict sequences of related events, steps of pathways, and complex concepts, easing comprehension. Other figures may show physiological processes.
Anatomical Structures
Some figures illustrate the locations of anatomical structures.
Other figures illustrate the functional relationships of anatomical structures.
Organizational Tables
Organizational tables can help “put it all together,” but are not a substitute for reading the text or having good notes.
TABLE 5.6 Muscle and Nervous Tissues
Type Function Location
Skeletal muscle tissue (striated)
Smooth muscle tissue (lacks striations)
Cardiac muscle tissue (striated)
Voluntary movements of skeletal parts
Involuntary movements of internal organs
Muscles usually attached to bones
Walls of hollow internal organs
Heart movements Heart muscle
Nervous tissue Sensory reception and conduction of electrical impulses
Brain, spinal cord, and peripheral nerves
It is critical that you attend class regularly, and be on time—even if the instructor’s notes are posted online and the information is in the textbook. For many learners, hearing and writing new information is a better way to retain facts than just scanning notes on a computer screen. Attending lectures and discussion sections also provides more detailed and applied analysis of the subject matter, as well as a chance to ask questions.
During Class
Be alert and attentive in class. Take notes by adding to your outline or the notes you took while reading. Auditory learners benefit from recording the lectures and listening to them while doing chores. This is called multitasking doing more than one activity at a time.
Participate in class discussions, asking questions of the instructor and answering questions he or she poses. All of the students are in the class to learn, and many will be glad someone asked a question others would not be comfortable asking. Such student response can alert the instructor to topics that are misunderstood or not understood at all. However, respect class policy. Due to time constraints and class size, asking questions may be more appropriate after class, for a large lecture class, or during tutorial (small group) sessions.
After Class
In learning complex material, expediency is critical. Organize, edit, and review notes as soon after class as possible, fleshing out sections where the lecturer got ahead of you. Highlighting or underlining (in color, for visual learners) the key terms, lists, important points, and major topics make them stand out, which is helpful for daily reviews and studying for exams.
Lists
Organizing information into lists or categories can minimize information overload, breaking it into manageable chunks. For example, when you study the muscles of the thigh, you will find it easier to learn the insertion, origin, action, and nerve supply of the four muscles making up the quadriceps femoris if you study them as a group, because they all have the same insertion, action at the knee, and nerve supply— they differ only in their origins.
Mnemonic Devices
Another method for remembering information is the mnemonic device. One type of mnemonic device is a list of words, forming a phrase, in which the first letter of each word corresponds to the first letter of each word that must be remembered. For example, Frequent parades often test soldiers’ endurance stands for the skull bones frontal, parietal, occipital, temporal, sphenoid, and ethmoid. Another type of mnemonic device is a word formed by the first letters of the items to be remembered. For example, ipmat represents the stages in the cell cycle: interphase, prophase, metaphase, anaphase, and telophase. Be inventive! Develop mnemonic devices that you find helpful!
Study Groups
Forming small study groups helps some students. Together the students review course material and compare notes. Working as a team and alternating leaders allows students to verbalize the information. Individual students can study and master one part of the assigned material, and then explain it to the others in the group, which incorporates the information into the memory of the speaker. Hearing the material spoken aloud also helps the auditory learner. Be sure to use anatomical and physiological terms, in explanations and everyday conversation, until they become part of your working vocabulary, rather than intimidating jargon. Most important of all—the group must stay on task, and not become a vehicle for social interaction. Your instructor may have suggestions or guidelines for setting up study groups.
Flash Cards
Flash cards may seem archaic in this computer age, but they are still a great way to organize and master complex and abundant information. The act of writing or drawing on a note card helps the tactile learner. Master a few new cards each day and review cards from previous days, then use them all again at the end of the semester to prepare for the comprehensive final exam. They may even come in handy later, such as in studying for exams for admission to medical school or graduate school. Divide your deck in half and flip half of the cards so that the answer rather than the question is showing. Mix and shuffle them. Get used to identifying a structure or process from a description as well as giving
a description when provided with the name of a process or structure. This is more like what will be expected of you in the real world of the health-care professional.
Manage Your Time
For each hour in the classroom, most students will spend at least three hours outside of class studying. Many of you have important obligations outside of class, such as jobs and family responsibilities. As important as these are, you still need to master this material on your path to becoming a health-care professional. Good time-management skills are therefore essential in your study of human anatomy and physiology. In addition to class, lab, and study time, multitask. When you are waiting for a ride or sitting in a doctor’s waiting room, use your time by reviewing notes or reading the text.
Summary Outline
A summary of the chapter provides an outline to review major ideas and is a tool for organizing thoughts.
P.1 Introduction
Try a variety of methods to study the human body.
P.2 Strategies for Your Success
Although strategies for academic success seem to be common sense, you might benefit from reminders of study methods.
1. Before class
Read the assigned text material prior to the corresponding class meeting.
a. Photographs give a realistic view, and line art shows different perspectives.
b. Figures depicting macroscopic to microscopic show increase in detail.
c. Flow charts depict sequences and steps.
CHAPTER ASSESSMENTS
Chapter assessments that are tied directly to the learning outcomes allow you to assess your mastery of the material.
(Note the purple assess arrow.)
P.1 Introduction
1. Explain why the study of the human body can be overwhelming.
P.2 Strategies for Your Success
2. Methods to prepare for class include
a. reading the chapter
b. outlining the chapter
c. making a vocabulary list
d. all of the above
Daily repetition is helpful, so you should schedule several short study periods each day instead of an end-ofsemester crunch to cram for an exam. This does not take the place of time spent to prepare for the next class. If you follow these suggestions for learning now, you can maximize your study time throughout the semester and will give yourself your best prospects for academic success. A working knowledge of the structure and function of the human body provides the foundation for all careers in the health sciences.
PRACTICE
3. Why is it important to prepare before attending class?
4. Name two ways to participate in class discussions.
5. List several aids for remembering information.
d. Figures of anatomical structures show locations.
e. Organizational charts/tables summarize text.
2. During class
Take notes and participate in class discussions.
3. After class
a. Organize, edit, and review class notes.
b. Mnemonic devices aid learning.
(1) The first letters of the words you want to remember begin words of an easily recalled phrase.
(2) The first letters of the items to be remembered form a word.
c. Small study groups reviewing and vocalizing material can divide and conquer the learning task.
d. Making flash cards helps the tactile learner.
e. Time management skills encourage scheduled studying, including daily repetition instead of cramming for exams.
3. Describe how you can participate in class discussions.
4. Forming the phrase “I passed my anatomy test” to remember the cell cycle (interphase, prophase, metaphase, anaphase, telophase) is a device.
5. Name a benefit and a drawback of small study groups.
6. Give an example of effective time management used in preparation for success in the classroom.
INTEGRATIVE ASSESSMENTS/CRITICAL THINKING
A textbook is inherently linear. This text begins with Chapter 1 and ends with Chapter 20. Understanding physiology and the significance of anatomy, however, requires you to be able to recall previous concepts. Critical thinking is all about linking previous concepts with current concepts under novel circumstances, in new ways. Toward this end, we have included in the Integrative Assessments/Critical Thinking exercises referencing sections from earlier chapters. Making connections is what it is all about!
OUTCOMES P.1, P.2
1. Which study methods are most successful for you?
Check out McGraw-Hill online resources that can help you practice and assess your learning.
Connect Interactive Questions Reinforce your knowledge using assigned interactive questions.
Connect Integrated Activity Practice your understanding.
OUTCOME P.2
2. Design a personalized study schedule.
Learn Smart Discover which concepts you have mastered and which require more attention with this personalized, adaptive learning tool.
Anatomy & Physiology Revealed Go more in depth using virtual dissection of a cadaver.
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had its eastern outlet, if any, in the Icy Sea; he had ascertained that the American continent stretched away hundreds of miles beyond what had hitherto been accepted as its western limits; he had seen that the extreme North was inhabited by a race differing essentially from all their southern neighbors; he had noticed the trace of the existence of thousands of whales, seals, and other valuable denizens of the deep; but what was all this, in Hearne’s estimation, compared to the unvarnished fact of the existence of a new ocean!
Hastening back to Hudson’s Bay with the great news, Hearne saw the copper-mine of which Indian tradition had told so much. It was a poor, exhausted mine, not likely to yield the smallest profit to the Company; but what of that? The Arctic Ocean lay beyond it! Following a somewhat more westerly course than on his northern journey, Hearne entered level districts abounding in game; but what of that? The Arctic Ocean washed the desolate shores above the furyielding plains! A fair young Indian woman, who had escaped from some Athapescow warriors after the murder of her whole family, was found dwelling alone in a little hut, supporting herself by hunting deer and snaring rabbits. Hearne’s followers wrestled for the possession of the young exile as a wife, and she was carried off by the victor; but this strange and significant scene could scarcely interest our hero now. The Arctic Ocean was awaiting its explorers—alas! also its victims—and the ways of the natives, who had so little valued the great fact of its existence, were of small account.
Roused from its lethargy at last by the report brought home by its gallant employé, the Hudson’s Bay Company now did all in its power to encourage further research, and to its efforts were due the sending forth of Franklin on his first great voyage, which ushered in a new era of Arctic exploration.
Before either Franklin, of Arctic renown, or Mackenzie, second only in fame as an inland explorer to Hearne, was ready to start, however, much good work was done by private adventurers, especially by Finlay, Currie, Frobisher, and Pond, who, between 1763 and 1778, penetrated to the banks of the Saskatchewan and
Churchill Rivers, and to the shores of Athabasca Lake, making intimate acquaintance with the Hare and other Indian tribes, and paving the way for the voyages on the Mackenzie, Peace, and Slave Rivers, which were among the most noteworthy feats of the new claimant for the possession of the fur-yielding districts of the extreme North-west.
Alexander Mackenzie, the hero of these important trips, was bred a clerk in the service of the North-west Company, and, before starting on his voyage as a geographical explorer, properly so called, had served a long apprenticeship at the advanced station of Fort Chipewyan, on the Athapescow Lake, whence he made several overland excursions in different directions.
On the 3d June, 1789, our hero embarked in a native canoe on the Slave River, and following its course, then unimpeded by ice, in a northerly direction, he arrived on the 9th of the same month at the Slave Lake. Skirting along its shores in a westerly direction, he presently discovered the important river bearing his name, which has since been found to be identical with the Athabasca, rising in the Rocky Mountains near Mount Brown, and also with the Slave, the combined waters of the two streams flowing, after their junction, to the Arctic Ocean in Mackenzie Bay, N. lat. 70°, W. long. 136°.
Anxious to trace the course of the Mackenzie, the explorer was about to proceed along it in his canoe, when he was told by some wandering Indians that certain death would be the result, for the bed of the stream was haunted by huge monsters, who would devour all who came in their way. Moreover, it would take many years to reach the salt water. The white man had better return the way he came. In any case, he could hope for no help from the redskins.
Though these terrible prophecies did not affect Mackenzie himself, they paralyzed his guides, who declared they would go no further; and after trying alike persuasion and force, the Europeans determined to do the best they could alone. They appear to have penetrated as far north as the Great Bear Lake, but here, for some reason of which we find no explanation in Mackenzie’s journal, the
canoe was turned southward, and the voyage back to the Slave Lake resumed. “My people,” says Mackenzie, “could not refrain from some expressions of real concern that they were obliged to return without reaching the sea;” but he apparently made no great effort to gratify them.
Back again to Fort Chipewyan, Mackenzie lost no time in preparing for a second journey of discovery. Embarking on the Peace River, a tributary of the Slave or Athabasca, he followed its course in a south-westerly direction, till he reached the first spurs of the snow-clad Rocky Mountains, whence issued the river under examination. Here the canoe was, of necessity, abandoned, and an arduous climb began, resulting, however, in the successful scaling of the rugged ridge, and the safe arrival at a village on its western side, where the weary travelers were regaled with salmon, a fish never before met with on their travels in North America.
The inhabitants of this remote home in the wilderness were of a far more civilized appearance than the Indians of the East; and as the sea was approached by the explorers, they passed through settlements numbering hundreds of well-built houses, peopled by
MACKENZIE’S FIRST VIEW OF THE PACIFIC OCEAN.
various tribes belonging to the southern branches of the great hyperborean group. Members of the Sicannis and other Rocky Mountain families were met with, who, one and all, showed courtesy to the white strangers, though they were jealous of any interference with their fishing or hunting; and as the western coast was approached, the active and intelligent Thinkleets, chiefly of the Stikeen and Tungass tribes, excited the admiration of their visitors by their ingenuity in the construction of domestic and other implements, and their skill in painting and carving.
The shores of the North Pacific Ocean were finally reached in north latitude 52° 20′ 48″. The whole of the continent of British America had for the first time been traversed; its vast breadth had been proved beyond a doubt; and the connecting link between the discoveries on the western coast and those from the East, whether from Hudson’s Bay, New England, or the Southern States, was added at last. Yet in Mackenzie’s account of his work he scarcely notes the first sight of the sea; we have searched in vain for any details of his sojourn on its shores. Having done what he came to do, he turned back, and retraced his steps, winding up the ♦narrative of his adventures with this simple and unostentatious sentence:—“After an absence of eleven months I arrived at Fort Chipewyan, where I remained for the purposes of trade during the succeeding winter.”
♦ ‘narative’ replaced with ‘narrative’
CHAPTER XII.
ASTORIA AND ITS FOUNDERS.
BY the beginning of the 19th century, or, to be more strictly accurate, before the year 1810, a general notion had been obtained of the extent, form, and main physical features of North America. The journeys of Pike, Lewis and Clarke in the southern half of the vast continent, with those of Hearne and Mackenzie from Hudson’s Bay, were now followed up by a series of expeditions, working either under the orders or with the sanction of the American Government, by which the regions south of the Missouri, those bordering on the Upper Mississippi, and the fertile provinces now known as British Columbia, Washington, and Oregon, were thoroughly explored.
The first man to take up the work begun by the heroes we have been noticing was John Jacob Astor, who, after long negotiations with the various companies struggling for the monopoly of the furtrade of the North, succeeded in founding yet another association, under the name of the Pacific Fur Company. This new confederation, having won the co-operation of many of the best agents of its rivals, found itself in a position to compete with them on more than equal terms, and, as early as 1810, a thoroughly well-organized expedition, divided into two parts—one going by land, the other by sea—started for the mouth of the Columbia, where it was proposed to erect a fort as the head-quarters of the new trade to be opened.
After a successful voyage from Montreal via the Sandwich Islands, the Tonquin, bearing the advanced guard of traders and emigrants, including Mr. M’Dougal, who represented Mr. Astor, cast anchor off the mouth of the Columbia. Here a landing was at once effected, and M’Dougal and his chief assistant, a man named Stuart, were hospitably entertained by the Chinooks, whose chief aided them in selecting a suitable place for the foundation of their fort, and showed no jealousy of their wish to settle near him.
The town now known as Astoria (N. lat. 46° 11′, W. long. 123° 42′) was quickly built; a factory soon rose beside it; the natives came in with their furs for sale; and all seemed likely to go so well, that the Tonquin was allowed to start on a trading trip up the coast, leaving but a few settlers to await the arrival of the land party. No sooner was the vessel out of reach, however, than rumors began to be circulated of a conspiracy among the neighboring tribes to massacre all the white men; and while preparations were being made to meet this unexpected danger, some wandering Indians from the Straits of Juan de Fuca brought tidings that the Tonquin had been lost with all on board. The truth of this melancholy event was soon confirmed by members of yet another tribe, and gradually the whole story leaked out.
The Tonquin had fallen a victim, not to the usual perils of the deep, but to a quarrel between Thorn, its captain, and some natives of Vancouver’s Island. Steering to the north, with an Indian named Samazee as interpreter in his proposed dealings with the natives, Thorn reached Vancouver’s Island in safety, and cast anchor in the harbor of Neweetee, though Samazee warned him that the people about there were not to be trusted. On the following day the ship was boarded by a number of natives, including two sons of Wicanainsh, the chief of the country round Neweetee, and an old chief named Nookamis, who had long been accustomed to drive bargains with the English.
Suspecting no evil, Captain Thorn prepared for a good day’s business, and made what seemed to him fair offers for the finest of
the sea-otter peltries brought by the redskins. Nookamis shook his head; he must have double the prices quoted. His companions followed suit; not a skin could poor Captain Thorn obtain.
Surprised and disgusted at the turn affairs had taken, the English now tried new tactics. They took no further notice of the Indians, but paced up and down the deck with their hands in their pockets. Nookamis, however, looking upon all this as a mere maneuver to try his patience, continued to ply the captain with offers of otter-skins; and finding that nothing he said had any effect, he began to jeer the white man for a stingy fellow Thorn now lost his temper, and, turning upon his persecutor, he snatched the otter-skins from him, flung them in his face, and kicked him down the ship’s ladder.
The rest of the natives were furious, and hurried after their spokesman, leaving the deck strewn with peltries. A little later, some of the whites who had gone on shore returned to the vessel, and urged the captain to weigh anchor, as they feared a general attack from the natives. In this advice they were seconded by Samazee, who declared that the vengeance for the insult offered to a chief would be terrible. But Thorn’s blood was up. He declined to leave the coast; and when further urged, replied by pointing to his guns, as protection enough against savages.
Early the next morning, when the crew of the Tonquin were still in their hammocks, a canoe full of Indians came alongside. Were these the prophesied avengers? Surely not! They were unarmed, and held up otter-skins in token of friendly intentions. They were allowed to climb on board, and so were a second party of twenty, who arrived immediately afterward.
A brisk trade was now begun; but as the officers turned over the skins offered to them, other canoes put off from the shore. The Tonquin was soon surrounded by them; its single ladder was quickly crowded with dusky warriors, who, pouring upon the deck in a steady stream, also produced skins, offering to trade with the captain on his own terms now, and implying, though not expressing, regret at the obstinacy of their representatives the day before. The chief things
the natives wanted instead of their costly peltries were knives; and with an almost foolhardy recklessness, Thorn allowed them to appropriate a large number, in spite of the repeated warnings of his officers and the interpreter that treachery was intended. The only precaution taken was the telling-off of sailors to weigh anchor and make sail, the captain imagining that this would not be noticed, and that, having obtained his cargo of peltries, he could escape before the Indians had time to carry out any evil designs.
Never was a more terrible mistake made. The signal from the captain for the deck to be cleared was also that for the onslaught to be given. The knives just obtained, and the war-clubs already provided, were brandished on every side, and before they could defend themselves, many of the white men fell beneath the wellaimed blows.
The ship’s clerk was one of the first to fall, and among the next victims was a man named M’Kay, who was flung backward into one of the waiting canoes, and there hacked to pieces by the squaws, who were watching the affray with eager delight. Very brave was the defense made by Thorn himself, and at one time he seemed likely to escape. He had fought his way nearly to the cabin, where he had left his firearms, when loss of blood compelled him to lean for support upon the tiller wheel. He was instantly surrounded, flung upon the deck, and stabbed to death with his own knives.
All but four of the crew shared the fate of the officers. These four, who had been aloft making sail when the conflict began, succeeded in reaching the cabin, where they made a hasty defense. The firearms, which now came into play, soon cleared the deck, and an hour after the fatal admission of the redskins on board, not a sign of them was to be seen.
The interpreter, to whom we owe this narrative, had wisely taken no part in the struggle, and retired with the natives. He tells further how the night was passed on shore among them, and how, though they were still eager for further revenge, they were deterred from approaching the vessel by their dread of the firearms. Early the next
morning, a canoe, bearing the interpreter among others, ventured cautiously to paddle within hail. A man presently appeared on deck, and made signs to the redskins to come on board. They hesitated, but, curiosity prevailing over fear, several of them climbed up the ladder. They were allowed to wander about unmolested. The white man they had seen had disappeared; and one by one other canoes crept from the shore, till, as on the day before, the sea was covered with them.
The savages who had first arrived called to their comrades to come on, for there was no danger and plenty of plunder They were obeyed by all, even by the hitherto cautious interpreter. Eagerly were the bales of merchandise now plundered; wild were the gestures of delight at the strange articles found among them—But what was that? Was the ship moving, or what? An instant’s pause of expectation, and then the vessel blew up with a loud noise; the air was darkened with the bodies of the unhappy savages which fell in every direction, torn to a thousand fragments.
The interpreter again escaped as by a miracle. He was clinging to the main chains when the explosion took place, fell into the water, and swam to one of the canoes, in which he made his way back to the land, where crowds had already assembled, and met him with eager inquiries as to the cause of the terrible scene. He was still the center of an eager group when four white men were brought as prisoners into the village, who told how they had escaped from the Tonquin when Lewis, the man who had decoyed the natives on board, decided to blow up the ship. They had hoped to find their way to their comrades at Astoria, but they had been unable to get out of the bay; their boat was cast on shore, and they were soon seized by natives.
They were put to death with all the refinements of cruelty in which the Indians have ever been adepts; and not, as we have seen, until the interpreter managed to pay a visit to Astoria was the whole melancholy story known.
If the position of the Astorians was painful when it was supposed that the absence of the Tonquin would not be long protracted, we can imagine what it became now. The savage tribes around them, encouraged by the first success of their brothers of the North, and enraged at the terrible vengeance taken upon them, were more determined than ever to root out the hated white men from their land, and it appeared likely that they would accomplish their purpose, when M’Dougal hit upon a stratagem.
A few years previously, smallpox had ravaged the coast north and south of the Columbia; whole tribes had succumbed to it, and the mere mention of it was enough to cow the spirit of the most dauntless brave. None knew whence it came, but it was supposed to be sent by the Great Spirit to correct his children for their sins, and many connected it with the first coming of the white man.
M’Dougal, reminded by some trifling incident of the latter superstition, invited the leaders of the conspiracy against the infant colony to come and take council with him. They obeyed, wondering, doubtless, in their simple minds whether their designs had been discovered. When all were seated, and expectant silence reigned on every side, the white man stood in the midst and began his harangue.
“Your countrymen have destroyed our vessel,” he said, “and I am resolved on vengeance. The white men among you are few in number, it is true, but they are mighty in medicine. See here,” he went on, producing a small bottle; “in this bottle I hold the smallpox safely corked up. I have but to draw the cork and let loose the pestilence, to sweep man, woman and child from the face of the earth.”
Great was the horror and alarm at this announcement. The chiefs, forgetting their dignity, gathered round the white man, imploring him to stay his hand; and after affecting to be unmoved for some little time, M’Dougal at last declared that, so long as the white people were unmolested, the phial of wrath should be unopened, but――
The remainder of the scene may be imagined. Eternal amity was finally sworn, and M’Dougal, henceforth to be known as the Great Smallpox Chief, was able to attend without interruption to the internal affairs of the colony.
While the Astorians were thus struggling with their difficulties, the land party were working their way across the country to their assistance. At the head of this second expedition was William Hunt, with whom was associated Donald Mackenzie, both men of tact and experience in dealing with the Indians.
The start was made early in July, 1810, from Montreal, which we have visited under so many different auspices, and, on the 22d, Mackinaw, on the junction of Lakes Huron and Michigan, was reached. This town, first an Indian village and then a French trading post, was now the center of a numerous and mixed population. Here traders bound for Lake Superior, for the Mississippi, the Missouri, the Arkansas, or other rivers, met on their way to their several outlying posts. Here they returned laden with the spoils of the far West.
A long halt was made at Mackinaw to collect recruits, who were not easily met with. It was no joke, urged the redskins, to travel with these white men; they wanted you to go through wildernesses full of savage tribes, with whom they would have to fight, and if any of them escaped death at the hands of their fellow-countrymen, it would only be to starve in those desolate tracts on the other side of the Rocky Mountains. Why should our white man be so anxious to reach the Salt Lake (the sea)? or why, if his anxiety was so very great, would he not give his poor brothers their pay in advance, that the squaws and little ones at home might not pine away in hunger?
Not until the 12th August was the actual start made, and even then, instead of being able to strike across country at once for the mouth of the Columbia, the expedition had to make a voyage down the Mississippi to St. Louis, in order to settle certain difficulties, into which we need not enter here, with the numerous rival companies already alluded to. The starting point of so many expeditions was reached in September, and on the 21st November three canoes,
bearing the new body of adventurers, embarked on the Missouri. Even now, progress was extremely slow. Hunt was more than once compelled to return to St. Louis to settle disputes with his rivals; and, as the boats crept cautiously along, rumors of a very discouraging character again and again reached the navigators. There was war among the native tribes, and a party of Sioux Indians were awaiting the arrival of the white men in the wilds of Nebraska, intending to massacre them all.
At the mouth of the Nebraska, signs appeared that the rumors of danger from savages were founded on facts. A frame of a skin canoe was found, in which the warriors had evidently crossed the river, and at night the sky was red with the reflection of huge fires, showing that the prairies had been set on fire by the combatants. Ignoring as much as possible all these terrible omens, Hunt, fresh from his last run back to St. Louis, carefully examined the face of the country on either side of the Nebraska; the naturalists of the party made their notes on the flora and fauna of the new districts; and on the 10th May, the village of Omaha, about eight hundred and thirty miles above the mouth of the Missouri, was reached in safety
Hospitably received by the little remnant of the once powerful Omaha tribe, who had been in the habit of considering themselves superior to all other created beings till the smallpox had swept half of them away, Hunt rested here awhile before commencing his great journey westward, which rivals in its terrors, and the courage with which they were met, some of the more famous African expeditions.
At Omaha, the fame of the great chief Blackbird, who has figured in so many romances, still lived, and Hunt and his party were among the last white men to look upon the sacred mound beneath which his body reposes, with its ghastly trophies of scalps still displayed on its summit, suspended upon the staff of the hero’s banner. The mound itself is still pointed out to the modern traveler, but the scalps, with so many other relics of the olden time, are gone.
A little below the Great Bend of the Missouri, the first encounter took place with the Indians. A scout was seen galloping wildly to and
fro on the opposite bank as the traders were at breakfast, and at once divining the meaning of his appearance, the canoes were brought out, and ready for all contingencies, the white men pulled boldly up the stream. Their suspense did not last long. An hour’s row brought them suddenly face to face with the enemy. An island intervening had at first hidden them from sight, but, as the canoes shot past it, the banks beyond were revealed, crowded with warriors painted and decorated for battle.
To advance appeared certain death, to retreat scarcely less perilous, as the savages could easily have followed the canoes down the river. To pull into mid-stream appeared at first a feasible compromise, but it was found that the current was too strong. A momentary pause, a few hurried questions of each other, and the white men resolved to fight. The boats were pulled to the shore opposite the Sioux; the guns were examined, and fire was opened on the enemy.
The effect was marvelous. As the reports rang out, the dusky warriors faltered. It was something new in Indian warfare for those for whom the ambush had been prepared to take the initiative! The guns were now reloaded, and the Canadians prepared to row across the Missouri, intending to fire again when within easy range of their adversaries. As the white men rose to take aim, however, there was cry of “Stop!” from their interpreter. The savages were holding their buffalo robes above their heads; it was their signal of a desire for peace, and a bloody struggle might yet be averted.
The guns were lowered; the Canadians resumed their seats. A dozen of the Sioux approached the banks, lighted a fire, seated themselves about it, and, holding up the calumet made signs to the white men to land. Seeing that no alternative was left them between trusting to these friendly overtures and fighting against terrible odds, Hunt and the other leaders of the party accepted the invitation, and were soon seated in the circle, smoking the pipe of peace in silence, as the inevitable preliminary of a treaty to be made.
This opening ceremony over, Hunt now explained the real object of his journey to be trade, only trade which was to bring about great results for the natives; and, as an earnest of his good intentions, he ordered a quantity of tobacco and corn to be brought from the boats and presented to the chiefs as a free gift.
Hunt’s ready tact was rewarded as it deserved. The chief of the chiefs responded in his turn, saying that he had thought his white brothers were carrying arms to his enemies the Minatarees and Mandans, hence his hostility. Convinced that no supplies of weapons were among the stores on the way to the fastnesses of the hostile tribes, he would offer no further opposition to the expedition, which had better, however, keep to the other side of the river, as some hotheaded young fellows among his followers were not to be trusted.
So ended an incident that had threatened the very existence of the whole party. Hands were shaken all round—to shake hands was one of the first things taught by the white men to the red—and the traders re-embarked, taking care to follow the hint given by the now friendly chief.
The next day, June 1st, the Great Bend of the Missouri, first visited by Lewis and Clarke, was reached, a little beyond which the explorers met a large party of Mandan and Minataree warriors, by whom they were, very much to their surprise, received with great enthusiasm, and carried off to the camp in the wilderness for the night.
Glad to have won friends on both sides among the hostile Indians, Hunt now pushed rapidly on up the Missouri, halting here and there to trade with the natives, and on the 18th July reached the most northerly point on his voyage, an Aricara village, from which he proposed striking across country to the Black Mountains on the west.
Now began the most arduous part of this great journey. The vast prairies to be crossed were practically unknown to the white man, though they had probably been scoured by many an adventurous hunter, of whose experience no record exists. On one side dwelt the
Cheyenne, on the other the Blackfeet Indians—at war with each other, as most Indian tribes appear to have been at this time. It was doubtful whether either or both would care for the white men to pass through their territory.
On the second day’s march, some of the leader’s anxieties were allayed by his cordial reception in a Cheyenne camp, the owners— cleanly, civil, decorous fellows—placing all they had at his disposal, and eagerly purchasing the trinkets offered to them for sale. On the 6th August, the friendly Cheyennes were left behind and the Crow country entered, where a subtle danger awaited the travelers, of which Hunt received warning just in time.
A short time previously, a man named Edward Rose had been engaged as interpreter for the passage of the Crow districts, he having been known to have spent many years among its wild inhabitants. That he had married a Crow woman, and identified himself with the interests of her tribe, was not known until afterward; but on the eve of the entry into his adopted country, Rose was overheard proposing to some of Hunt’s followers that they should desert to the Crow camp with all the horses they could carry off, where he (Rose) would join them, and show them how to entice other unsuspecting travelers from the right way to the coast.
Sending for Rose to his own tent, Hunt, showing no knowledge of his nefarious schemes, informed him that he should not require his services beyond the Crow country, but that, in consideration of his faithfulness, he should have a horse, three beaver traps and other valuable accessories to a hunter’s equipment, when the Canadians were safely through the passes of the Black Mountains.
Surprised at this liberality, which made it really scarcely worth his while to play traitor, Rose resolved to undo what he had begun. A message was conveyed to his allies, the Crows, instructing them to treat his white friends courteously; it was resolved in council by the chieftains that no harm should be done to the pale faces; and Hunt, still showing no sign of knowledge of the by-play, entered the mountain fastnesses without fear.
The Black Hills, forming the dividing line between the waters of the Missouri and those of the Arkansas and Mississippi, were soon reached, and unappalled by the wild tales told of the genii, or thunder spirits, who would resent their intrusion, the Canadians endeavored to cross them. They failed in doing so, and their guide attributed their failure to the obstacles thrown in their way by the invisible “Lords of the Mountain.” Of their interference, however, Hunt has given no record, his account being simply that he had to turn back because of the physical peculiarities of the mountains, their wild ravines and terrible precipices being simply impassable to all but the black-tailed deer, and the strange ahsata or big horns haunting its lonely defiles.
A considerable détour southward had to be made, and a path was finally found along a ridge dividing the tributary waters of the Yellowstone and Missouri Rivers, and on the 22nd August they met the first Crow warrior, who proved to belong to a large band returning from their annual trading trip to the Mandan country.
Rose was now sent on in advance, to hold a parley with his friends, and invite some of them to come to the Canadian camp. This many readily consented to do, and Hunt was agreeably surprised at the manly bearing of some of the young horsemen among his visitors, proving that, but for the timely warning received, it might have gone hardly with his party among them. Old and young, rich and poor among this mountain tribe were mounted on steeds of some description, and managed their horses with unrivaled skill; the very babies, too young to speak, were tied on small colts or ponies, and wielded their whips as if by instinct.
Escorted by some two hundred equestrians, the dreaded passage of the Crow country was made, and the hunting-grounds of the Shoshones reached in safety. Rose and his dusky comrades were dismissed, and their places supplied by Shoshone trappers, who allowed the white men to share in their hunting expeditions, and led them to a commanding height, from which they pointed out three
snow-clad mountain peaks, beneath which, they said, rose the Columbia.
Overjoyed at the thought of being almost within sight of the river at the mouth of which their comrades were awaiting them, the little band pressed on with renewed vigor, and on the 24th September they reached the banks of a wide and rapid river—known as the Mad among the natives, on account of its wild and turbulent course— where a consultation was held as to whether it should or should not be followed. It was wide and deep enough to admit the passage of canoes, and it might possibly flow into the Columbia. The Canadians one and all preferred traveling by water to “scrambling over the backs of mountains,” their trips up and down the St. Lawrence and across the Great Lakes having rendered them the most expert of oarsmen. Already they saw themselves shooting from the Mad River into the Columbia, and thence to Astoria.
Embarkation was almost unanimously decided on—although one or two of the older members of the party hinted at the difficulty of return, if, after all, the Mad River did not flow into the Columbia—and a fatal mistake would probably have been made, had not two Snake Indians from the West arrived in the nick of time, with the glad tidings that a trading post, situated on the upper branch of the Columbia, was not far off, and that from it the passage down to the sea was easy.
The programme was changed at once. The encampment was broken up, the Mad River crossed, and a little later the post alluded to was reached. It was deserted, but its log huts afforded an admirable shelter during the construction of canoes for the voyage down the river; and on the 18th of October all was ready for the last stage of the long journey. Fifteen canoes were launched on the Henry River, so called after the owner of the trading post, and a day’s paddle brought the Canadians to its junction with their old friend the Mad River
The united streams now took the name of the Snake, and turned out, on examination, to be identical with the Lewis fork of the
Columbia—a fact which greatly cheered the travelers, though their troubles were by no means yet at an end. The Snake was encumbered with rocks, its bed was seldom level, and again and again the canoes were nearly upset in the rapids. Not a human creature was to be seen on the banks; and as prairie succeeded prairie, and one wilderness of deserted mountains after another was passed, the spirits of the adventurers flagged.
On the 28th October the climax of the difficulties was reached. The Snake River entered a “terrific strait,” its whole volume being compressed into a space less than thirty feet in width, beyond which it flung itself down a precipice, and continued its course, raging and roaring in such a manner that Hunt named the cataract the Lion Caldron, a title which it still bears. In attempting to navigate this awful passage, one of the canoes was completely destroyed, and one man drowned, while his comrades barely escaped with their lives. Further progress by water was evidently impossible. The hope of shooting rapidly down to the sea had again to be abandoned; and, thoroughly disheartened, the travelers prepared to strike across country again, with a view to reaching the banks of the Columbia lower down.
Exploring parties were sent out in different directions to ascertain the best route; all of the baggage which could possibly be spared was buried in caches; and early in October the march was begun across a dry and trackless wilderness, tenanted only by a few wretched Shoshones, who fled at the approach of the white men.
Toward the end of November a large encampment of Snakes was reached, where provisions and some really trustworthy information as to the route to the coast were obtained; but it was bitterly cold, and the sufferings of the party between the Indian camp and the Columbia were extreme. Not until the 21st January did the longsought waters of the great stream of the West come in sight, and the transport of the weary travelers at this happy conclusion of their long wanderings may be imagined.
The spot at which the Columbia had at last been struck was a little below the junction of its two great branches, the Lewis and
Clarke, in about N. lat. 46° 8′, W long. 118° 50′. Its banks were dotted with the miserable huts of a wretched horde of Indians called Akai-chies, who wore nothing but the undressed skins of animals, and lived by fishing, scudding up and down the Columbia in rude canoes of pine logs hollowed out by fire.
From these Akai-chies Hunt received the first tidings of his comrades of the sea expedition; but fortunately, perhaps, for him, the simple savages only knew of the presence of white men at the mouth of their river, and could tell nothing of the disasters which had overtaken them Eager to join their friends, the traders now pushed on along the Columbia as rapidly as possible; and at a little village somewhat further down, they heard not only of the massacre on board the Tonquin, but of a plot for their own destruction. A party of braves said some wandering savages had arranged to attack the camp at night and carry off all the horses. With Hunt, to be forewarned was to be forearmed, and the precautions taken prevented any second tragedy; but it was with a sinking heart that he led his men in the last stage of his awful journey. If the rumor of the massacre on the Tonquin were true, there was of course little hope that the few survivors of Astoria had been able to hold their own against the natives, and the great expedition across the continent might perhaps end in the death of all concerned.
Early in February, after great sufferings from hunger and fatigue, canoes were at last obtained from some Indians, and, embarking on the Lewis fork of the Columbia, the Canadians rapidly shot down the river of so many memories to Astoria, where they arrived in safety, haggard, half-starved, and in rags, after a journey which occupied nearly eighteen months.
That the establishment at Astoria never flourished, as its founder hoped, is a well-known fact; but the heroic efforts made by the members of the two expeditions to carry out their instructions did much to pave the way for the colonization and civilization of the beautiful states of Oregon and Washington; and the numerous journeys, undertaken by Hunt, Mackenzie, and others among the
various chains of the Rocky Mountains, though their main object was trade, justly entitle them to rank as pioneers of geographical discovery. To them, too, the United States Government, though scarcely our own, owes a debt of gratitude, their early occupation of Astoria having been a main point in the American claim to the Oregon territory, which at one time seemed likely to have become the property of Great Britain.
