Question

The inner lining of the small intestine contains numerous villi. Are villi helpful in food absorption ? Give the reason behind your answer.​

Answer 1

Answer:

The major part of the process of digestion of food takes place in the small intestine. The digested food is taken up by the walls of the intestine. The inner lining of the small intestine contains numerous finger like projections called villi. The villi increase the surface area for absorption. Each villus is covered by a single layer of epithelium and contains blood vessels and lymph vessel. The food diffuses through the epithelium into the blood vessels. Glucose, amino acids, minerals and vitamins are absorbed in the blood vessels of the villi; the fatty acids and glycerol are absorbed by lacteals, which are carried to lymph vessels to the point where the lymph vessels empty into the blood stream.

Explanation:

Answer 2

Answer:

The major part of the process of digestion of food takes place in the small intestine. The digested food is taken up by the walls of the intestine. The inner lining of the small intestine contains numerous finger like projections called villi. The villi increase the surface area for absorption. Each villus is covered by a single layer of epithelium and contains blood vessels and lymph vessel. The food diffuses through the epithelium into the blood vessels. Glucose, amino acids, minerals and vitamins are absorbed in the blood vessels of the villi; the fatty acids and glycerol are absorbed by lacteals, which are carried to lymph vessels to the point where the lymph vessels empty into the blood stream.

Explanation: