Question

what feature of the small intestine greatly expands its surface area, facilitating absorption?
rugae
haustrae
microvilli
none of the above

Explanation:

Microvilli are tiny, finger - like projections on the surface of the cells lining the small intestine. They greatly increase the surface area available for the absorption of nutrients. Rugae are found in the stomach and help in stomach expansion. Haustrae are sacculations in the large intestine.

Answer:

C. Microvilli