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You have had a colonoscopy.

The intestines are made up of the small intestine and the large intestine or colon. Most of the nutrients are absorbed in the small intestine. The large intestine (colon) is where water and salt are withdrawn from the stool. The last segment of the large intestine (colon) is the rectum. Stool then leaves the body through the anus. The last segment of the large intestine consists of 2 sections. These 2 sections are the rectum and anal canal. The feces are collected in the rectum. The feces then move through the short anal canal to the anus. Feces are excreted through the anus.

The lower section of your rectum has been examined. To examine the lower section of the rectum, a rigid tube is inserted via the anus. A light is attached to the front of the tube. Via the tube the intestine can be viewed from inside, and changes in the membrane can be searched for.