Colonoscopy – image description

This illustration shows an outline of the bowel within a person’s body. It shows the different parts of the bowel including the sigmoid colon leading to the rectum (also called the back passage) and the anus. Within the bowel is a narrow, flexible tube with a light on the end. It passes from outside the body through the anus and back passage into the bowel. The tube goes all the way to the end of the bowel.