Each Epithelial Cell on the Villi of the Small Intestine

Each epithelial cell on the villi of the small intestine contains 500 microvilli.What is the purpose of these microvilli?

A) To increase surface area for food absorption
B) To beat and move food through the intestines
C) To contract and move food through the intestines
D) To release mucus that protects the intestines from infection
E) To release digestive enzymes