2.31 describe the structure of a villus and explain how this helps absorption of the products of digestion in the small intestine

Villi are in the small intestine: they are the surface through which food diffuses into the blood stream. They have thin walls (molecules can pass though easily) and increase surface area, which means the is more surface for diffusions to happen through. On the outside of the villi there are capillaries so it can directly pick up diffused food