And this smooth muscle basically contracts in a wavelike fashion and that creates the process of peristalsis, which basically moves our kind, the food, along our small intestine. Now, the region right below the smooth muscle layer is the epithelial layer. And attached to our epithelial layer, we basically have many of these projections which are known as villi. 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.