Question

State three features on how the ileum adapt to 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 blood capillaries also promote a steep diffusion gradient for efficient absorption of the digested food substances.

Explanation:

Absorption of the majority of nutrients takes place in the jejunum, with the following notable exceptions: Iron is absorbed in the duodenum. Vitamin B12 and bile salts are absorbed in the terminal ileum. Water and lipids are absorbed by passive diffusion throughout the small intestine.

Answer 2

The ileum /ˈɪliəm/ is the final section of the small intestine in most higher vertebrates, including mammals, reptiles, and birds. In fish, the divisions of the small intestine are not as clear and the terms posterior intestine or distal intestine may be used instead of ileum.[2] Its main function is to absorb vitamin B12, bile salts, and whatever products of digestion were not absorbed by the jejunum.