Question

The villi present on the wall of the small intestine

• A. Secretes digestive enzyme
• B. Increase surface area for absorption
• C. Hold mucus to protect wall
• D. None of the above

Answer 1

Answer: (B)

Increase surface area for absorption

• Villi present in small intestine increase intestinal absorptive surface area providing efficient absorption of nutrients in lumen.
• Mucosa is an innermost layer of tissues seen in the small intestine and is a mucous membrane that secretes digestive enzymes and hormones.
• A submucosa layer provides blood vessels, nerves and lymphatic vessels to support mucosa on the surface to protect the wall.

So the correct answer is 'Increase surface area for absorption'.