Caption

Intestinal villi. Computer artwork of a cross- section through intestinal villi, small finger- like projections on the wall of the small intestine. Within each villus is an arterial (red) and venous (blue) blood supply and a lymph vessel. The small intestine runs from the stomach to the large intestine. It is where digestion is completed and nutrients are absorbed into the blood. The villi increase the surface area available for this absorption.