Undigested food, water, and digestive juices pass into the large intestine. This part of the digestive tract begins in the lower right region of the abdomen with a small pouch, the cecum, to which the appendix is attached. The large intestine continues as the colon, a name that is often used to mean the large intestine because the colon constitutes such a large portion of that organ. The colon travels upward along the right side of the abdomen as the ascending colon, crosses below the stomach as the transverse colon, then continues down the left side of the abdomen as the descending colon. As food is pushed through the colon, water is reabsorbed and stool or feces is formed. This waste material passes into the S-shaped sigmoid colon and is stored in the rectum until eliminated through the anus.

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