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rickets, 93 smallpox, 7 Tay-Sachs disease, 51 see also, Cancer, Skin Disorders DNA. See Deoxyribonucleic acid Ebola virus, 17 Electron microscopes, 24, 48 problems with, 15 scanning electron microscope, 15, 17 transmission electron microscope, 15–17 Endocrine system, 6, 113 iodine and, 15 thyroid hormone and, 15, 18 Endosymbiotic theory, 53, 58 Epithelial tissue, 20, 76–81, 89, 94 apical surface, 78 basal lamina, 78 basal surface, 78 basement membrane, 78 cell layer classification, 78–81 characteristics of, 77, 90 function of, 76–77, 79, 81, 90 location of, 76–77, 79–81, 90 microvilli, 78 reticular lamina, 78 shape classification, 78–80 types of, 78–81 Extracellular matrix, 29 Filtration, 34, 40, 45, 79 Gastrointestinal system, 6, 73, 112 esophagus in, 22 small intestine in, 12, 22 stomach in, 22 Histology, 20 Homeostasis, 92–93, 104, 112 challenged, 114–25
Hooke, Robert and the origin of the cell, 11–12 Human body ability to heal, 6 care of, 8 make-up of, 6 risk factors effecting health of, 8 systems of, 6, see also specific systems Human genome, 7–8 Hydrogen as cell component, 15, 18, 22 Immune defense system, 28 blood cells of, 7, 10, 28 and hemoglobin, 15 Inorganic substances, 18–19, 22 salts, 19 Integumentary System, 92, 104–113 blood vessels in, 92, 102 cutaneous glands in, 109–11 epithelial cells in, 10 functions of, 93, 104 hair in, 92, 102, 104–9, 113 color of, 106 follicles of, 104–9, 113 functions of, 104 growth of, 107–9, 113 medulla of, 105–6, 113 root of, 106 shaft of, 105–6 structure of, 105 types of, 104–6 nails in, 92, 102, 104, 111 cuticle, 111–12 growth of, 111–12 lunula, 111–12 nail bed, 111–12 nail growth, 111 nail root, 111–12 nerves in, 92, 102
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