7th Biology - Functions in Organisms I

St. George's College

Subject: 7th BIOLOGY

Class: Functions in Organisms I: Food and Digestion Date: April 7th

Teacher's notes

Objectives

Vocabulary Link and Learn

Prepared by

2009 1

7th Beethoven ‐ Functions in Organisms I Name

Oral Intervention

Coin

Chocolate

Ariana Gabriel Andrea Abraham Giacomo Fabiana Sinead Liliam Francesca Rodrigo C. Andres Stefano Jean Pierre Diego Rodrigo H. Luis Andrea Sebastián Ivanna Camila Carlos Aarón Paola Enrique Alessandra Irma Sophia Naomi Kiara Christopher

2

7th Mozart‐ Functions in Organisms I Name

Oral Intervention

Coin

Chocolate

Nicole Luis Luciana Antonella Valeria Ch. Valeria C. Analucía Camila Franco Ramiro Sara Alicia José Luis Sergio Roberto Giancarlo Fiorella Gabriela Steffano Javier Diego Luis Fernando Sebastián Julio Sherley César Vilma Alessandra V.

3

FOOD AND DIGESTION

4

5

6

7

Why do you Eat? • Your body is full of chemical compounds. These chemicals are obtained through the food you eat.

• There are 3 main reasons for eating:

For Energy • Most functions of your organism require energy.

• Your food is the fuel that provides that necessary energy.

For Growth and Repair • When you grow, your body needs new cells.

• Your body also needs to replace old or damaged cells.

To stay healthy • All the chemical reactions in your body require chemicals, coming from foods or digested foods.

8

NUTRITION • Nutrition, is the process by which organisms take in and utilize food material.

• In terms of nutritional activities, two are the categories to consider: Autotrophs and Heterotrophs.

9

AUTOTROPHS

HETEROTROPHS

Organisms that produce their own food through the process of photosynthesis.

Process by which food is broken down by chemical and physical processes into suitable substances to be absorbed and assimilated into the body.

Organisms that are unable to produce their own food, and have to feed on other organisms.

Photosynthesis is a group of chemical reactions that use light to produce sugar and oxygen.

10

Types of Heterotrophs SAPROPHYTES feed on dead or decaying material using extracellular digestion, secreting digestive enzymes onto the food. Fungi and bacteria (decomposers) are members of this group.

PARASITES feed on other living organisms, their hosts. The relationship between the parasite and the host is beneficial to the parasite but harmful to the host.

HOLOZOIC FEEDERS include virtually all animals. They take their food into their bodies and digest it, with a specialized digestive system. These include herbivores, carnivores, detritivores.

MUTUALISM is a form of nutrition where there is close association between two species where both partners benefit.

11

12

13

14

15

Resources Used Slide Resource (Group)

Description

Origin

G1 ‐ 2 Image

Beethoven

http://bit.ly/Q7ggk

G1 ‐ 3 Image

Mozart

http://bit.ly/18LkW6

G1 ‐ 4 Image

Digestive System

http://bit.ly/tj9el

G1 ‐ 5 Animation Flash Unhealthy food Unknown G1 ‐ 7 Image

Nutrition

http://bit.ly/PuAs

G1 ‐ 8 Images

Autotroph Heterotroph Photosynthesis Digestion

http://bit.ly/5cOd9 http://bit.ly/M1d2 http://bit.ly/Cyjgi http://bit.ly/Ia5V

G1 ‐ 13 Image G1 ‐ 14 Image

16

Teacher's Notes This class has been designed to cover the topics of Functions in Organisms: Food and Digestion from Monday April 6th till Wednesday April 8th.

For further knowledge about this topic: 1. Conduct a thorough search under the topic: Functions in Organisms on the Web, books and magazines.

2. If findings are not specific, ask your teacher for suggestions.

BACK 17

Objectives • Identify and describe the functions in living organisms: Digestion, Respiration, Circulation.

Note: All, or most, of the objectives will be covered during class time, however the student must be responsible for those objectives not covered or concluded.

BACK 18

Vocabulary • • • • •

Circulation: Respiration: Vessel: Artery: Vein:

Note: Most of the vocabulary words will be covered during class time, however the student must be responsible for those words not covered or concluded.

BACK 19

Link and Learn You can visit the following websites to improve your understanding on the present topic: • http://science‐learning2009.wikispaces.com • http://learningandscience.blogspot.com • http://libraryatstgeorge.blogspot.com

BACK 20

Prepared by

Gerardo LAZARO Science Lead Teacher Email: glazaro@sanjorge.edu.pe Wiki: http://science‐learning.wikispaces.com Blog: http://learningandscience.blogspot.com Twitter: http://twitter.com/glazaro

BACK 21

Attachments

Science ­ 7th Grade ­ 7 life processes US.notebook KS3 Cells.notebook