Digestion

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Digestion of foods

Nutrients in foods

Starch and glucose

Carbohydrates

sugar and sucrose

Carbohydrates and fats

Source of energy and respiration

rice, butter, milk and bread

Proteins

Growth and repair of damaged tissues

fish, meat and egg white.

Digestion is needed

Small molecules are able to pass through cell membranes into cell

Starch , fats and protein molecules are too large to pass through

Meaning of Digestion

The small food molecules are: glucose(from starch), amino acids (from proteins) and glycerol and fatty acids (from fats)

Digestion takes place by the action of enzymes

Alimentary canal and digestion

Absorption of digested food

stomch

Digestion of proteins begins here

Mouth

Digestion of starch begins here

Small intestine

Most digestion takes place here

Food need to be digested

The breaking down of large food molecules into smaller food molecules in the body is digestion.

To groeth of new cells and tissues

To provide energy for keeping warm

To repair damanged tissuses

To keep health