Why are villi present in the intestine and not in the stomach ?

Answer brief : (i) Why are villi present in the intestine and not in stomach? (ii) How does pepsinogen change into its active form? (iii) What are the basic layers of the wall of alimentary canal? (iv) How does bile help in digestion of fat?

Why are Villi present in intestine and not in stomach?

Why are Villi present in intestine and not in stomach?

Why villi are present is small intestine and not in stomach?

Why are villi present only in the small intestine?

Villi are present in