Question

List the role of each of the fallowing in our digestive
system.
a) HCL 67 mucus c] Bill Sunce divili in
Smau intestine
e] velli in large intestine.​

Answer 1

Answer:

A)The hydrochloric acid in the gastric juice breaks down the food and the digestive enzymes split up the proteins. The acidic gastric juice also kills bacteria. The mucus covers the stomach wall with a protective coating

B) The villi and microvilli, with many folds, present on the lining of the small intestine, increase the surface area of the intestine for more absorption of the nutrients.The function of the plicae circulares, the villi, and the microvilli is to increase the amount of surface area available for the absorption of nutrients. Each villus transports nutrients to a network of capillaries and fine lymphatic vessels called lacteals close to its surface.

C ) 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.

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