Draw a diagram of human alimentary canal and label the following parts:

Question

(i) Draw a diagram of human alimentary canal and label the following parts:
(a) largest gland
(b) gland that secretes digestive enzymes and hormone
(c) part where HCl is produced. (iv) part where digested food is absorbed.
(ii) What are villi? Explain their function in the digestive system.

Answer 1

(ii) The inner surface of the small intestine has millions of tiny finger-like projections called villi. The presence of villi gives the inner walls of the small intestine a larger surface area. On the large surface area of the small intestine, absorption of food takes place quickly and goes into the blood through the blood vessels in villi.