1. 8A5 Digesting food Where does digestion happen?
Point to the part of the diagram where each type of food is digested.
Click to reveal the answers.
1. starch
3. proteins
2. fat

2. Enzymes Enzymes break up large molecules into small molecules.
large molecules  small molecules
The enzyme amylase converts starch to glucose.
(amylase)
starch  glucose
The enzyme lipase converts fat to fatty acids and glycerol.
(lipase)
fat  fatty acids + glycerol

3. Enzymes Proteases split up proteins into amino acids. (protease)
proteins  amino acids

4. Diffusion
Small molecules diffuse through the walls of the villi.

5. Do you know what happens to glucose?
Glucose is carried by the blood to the liver.
The liver changes glucose into glycogen.
Glycogen is stored.
When cells need more energy, glycogen is changed back into glucose and delivered to each cell.

6. Enzyme matching game Which enzyme is needed to digest which food?
Click to reveal the answers.
1. potatoes
2. chicken
6. cream
amylase
protease
3. pasta
lipase
5. beans
4. olive oil