Lets start from the beginning.

• A cell is the building block of every living thing. Example: muscle cell.

• A group of similar cells working together makes a tissue, example: muscle tissue.

• A group of different tissues working together makes an organ, example: heart.

• A group of different organs working together makes an organ system, example: circulatory system.

• Many different organ system make up an organism!!

Digestive system

Label the following:

A:…………………

B: …………………

C:…………………

D:…………………

E:…………………

F:…………………

G:…………………

H:…………………

I:…………………

J:…………………

K:…………………

A

B

C

D

E

F

G

H

K J I

Mouth

Appendix

Stomach

Rectum

Large intestine/ colon

Small intestine

Pancreas

Anus

Liver

Oesophagus

Salivary gland

Each Tooth has a special shape and role:

1. Incisors : sharp to cut

and bite food.

2. Canines: Sharp and

pointed to cut and tear.

3. Premolars: have

cusps and grooves to grind , crush & chew the food.

4. Molars: same as

premolars but larger in size

CanineIncisors

Premolars

Molars

Different teeth

showing crown and

root

Food groups

Carbohydrates:

are used as a fuel for the body, provides body with energy for respiration and growth.

ProteinsProvide the body with molecules needed to make new cells. Useful for growth and repair.

Fats Stored under the skin, acts as a heat insulator to keep body warm. It is a good store of energy.

butter cheese

milk

cream

Ghee/ margarine

oil

VitaminsProvide the body with molecules needed for a strong immune system, nerves, bones, skin and blood vessels. For general body health.

Micro-organisms in food production

Yeast is a fungus used in bread making.

Yoghurt makingA bacterium is used to make yoghurt from milk.

First milk is boiled to kill any microorganisms, then cooled to 40⁰C, then yoghurt is mixed with milk and kept warm for 6 hours till milk curdles (stiffens).