Question

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

Explanation:

Rugae are in the stomach, haustrae are in the large - intestine. Microvilli are tiny projections on the surface of the cells lining the small intestine that greatly increase its surface area for absorption.

Answer:

C. Microvilli