Previously we discussed the small intestine and we said that in the small intestine we have digestion and absorption taking place. So we break down the many macromolecules into their constituent units and then the interacy, the cells of the small intestine absorb those nutrients and transport those nutrients into the bloodstream and into our lymph system of our body. Now in this lecture we're going to focus on the proteolytic digestive enzymes that are produced by the small intestine as well as by the pancreas. And we're also going to discuss several important hormones that basically stimulate the process of digestion that are released by the small intestine. So let's begin with the proteolytic digestive enzymes of the small intestine. So as soon as our acidic kind actually leaves the stomach and enters our small intestine, it stimulates the small intestine to secrete specialized proteolytic enzymes.