Question

Why is the small intestine one cell thick

Answer 1

Villi, are meant for absorption of fatty acids in the small intestine as they have a thin wall, one cell thick, which enables a shorter diffusion path.

Answer 2

Answer:

Villi are specialized for absorption in the small intestine as they have a thin wall, one cell thick, which enables a shorter diffusion path. They have a large surface area so there will be more efficient absorption of fatty acids and glycerol into the blood stream.