Question

The given picture depicts the surface of the small intestine. What is the main function of this surface of the small intestine?

• A. It is to increase the surface area for absorption
• B. It is to increase the grinding of food
• C. It is to slow down the movement of food
• D. It is to store food for emergency

Answer 1

The correct option is A

It is to increase the surface area for absorption

The main function of the small intestine is absorption. Absorption is directly dependent on surface area. So to increase the surface area, the internal surface of the intestinal wall is folded onto itself creating villi.