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
