Question

Adaptations of the ileum for absorption of digested
food :

1. It is very long ; more surface area provided.
2. The large number of villi further increase the surface area for absorption.
3. Single-celled epithelium.
4. It is narrow which slows the movement of food,thereby allowing absorption.​

Answer 1

Answer:

The ileum has a large number of villi and microvilli to increase the surface area for absorption of digested food.

The ileum has a thin layer of cells for easy and fast diffusion of digested food.

The ileum has a dense network of blood capillaries in the villi into which amino acids, sugars,vitamins and minerals are absorbed.

The blood capillaries also promote a steep diffusion gradient for efficient absorption of the digested food substances.

The ileum has lacteals in the villi for absorption of fatty acids and glycerol.