And they also secrete special types of substances that ultimately are secreted into the small intestine and that increases the PH of our small intestine and that ultimately activates the special types of proteolytic enzymes that are involved in the breakdown of our food products inside the small intestine. So the liver, pancreas and gallbladder all play a role in producing and secreting special enzymes and other substances into our small intestine. And we'll discuss what these are in the next several lectures when we focus on the small intestine. Now, these enzymes play a role in digestion of carbohydrates into monosaccharides, in digestion of proteins into amino acids, dipeptides and tripptides, and fats into mostly fatty acids. Now, the small intestine doesn't only play a role in digestion, it also plays an important role in absorption. So all these individual constituent molecules are monosaccharides amino acids and fatty acids that are ultimately broken down from the carbohydrates.