Question

what role does villi perform in the small intestine

Answer 1

Villi and Absorption. Although the villi play a role in digestion, they also are essential for the absorption of digested nutrients. The cells of the villiand another part of the small intestine, known as the crypts, transport food from the digestive tract into the bloodstream, where they can be used by the body.
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Answer 2

The small intestine contains small finger-like projections of tissue called villi which increase the surface area of the intestine and contain specialized cells that transport substances into the bloodstream. Although these villi do not aid in the digestion of nutrients, they do help with nutrient absorption.