Picture of Colon
The colon, or large intestine, is the last part of the digestive tract. The colon reabsorbs water from digested food and concentrates waste material called stool. Stool travels through the colon to the latter part of the colon, the rectum. Stool leaves the body through the opening called the anus.
The colon is made of several layers of tissue. The innermost layer is called the mucosa. The next layers are the submucosa and muscularis propria. The next layer is the subserosa, and the final outermost layer is called the serosa.
Text Reference: "SEER Training Modules: Layers of Bowel Wall." National Cancer Institute.