The pancreas contains exocrine glands that produce enzymes important to digestion. These enzymes include trypsin and chymotrypsin to digest proteins; amylase for the digestion of carbohydrates; and lipase to break down fats.
Amylase, protease, and lipase are also produced in the small intestine, alongside peptidase and sucrases. Chemical digestion is completed in the small intestine before the chyme reaches the large intestine.
Unlike the small intestine, the large intestine produces no digestive enzymes. Functions of the large intestine include the absorption of water and electrolytes and the elimination of feces.
The rectum is an 8-inch chamber that connects your large intestine to your anus. The rectum, when anything (gas or stool) comes into your rectum, sensors send a message to your brain.
The anus is the last part of the digestive tract. It's made of pelvic floor muscle and two other muscles called anal sphincters. The pelvic floor muscle stops stool from coming out when it's not supposed to. The anal sphincters give you control over stool.