The [[1]] increase the surface area in the intestine and help absorb more nutrients from the food.

The villi are finger-like projections in the small intestine that increase the surface area for nutrient absorption from digested food. 

Along with villi, microvilli tiny brush-like structures that cover villi are also found. The combination of villi and microvilli improves nutrient absorption in the small intestine, allowing the body to extract as much energy and nutrients as possible from the food we eat. 

The presence of blood vessels in the villi facilitates absorption by transporting the absorbed nutrients to the rest of the body.