Answer:
Villi are finger-like projections that line the small intestine. They have several important functions. One function is to increase the surface area of the intestine, which helps to increase the absorption of nutrients from food. Villi also contain tiny blood vessels called capillaries, which allow nutrients to be transported from the intestine to the bloodstream. Additionally, villi contain specialized cells called goblet cells, which produce mucus that helps to protect the intestinal lining from damage.