And inside this cavity, this is the lumen of our small intestine. This is where the food, the kind, actually travels along. Now, if we zoom in on a single villas, we basically get the following microscopic structure. So notice along the border of our villas we basically have many, many of these intestinal cells we call anterocytes. And each one of these interasides contains tiny hairlike projections known as microvilli. So the villi and the microvilli, what the purpose of these structures are, is to basically greatly increase the surface area of the small intestine.