Question

small intestine is the longest part of alimentary canal why?

Answer 1

Small intestine is the longest part of the alimentary canal because it is the main organ of absorption and digestion of food. The surface area of the small intestine gets increased because of the presence of villi which gives food plenty of time to break down properly.

Answer 2

because when food is passed through it the villi present in small intestine absorb the food so as long the small intestine as more the villi and as more the food absorption