The colon and how its bacteria helps digest food. The colon is a part of the digestive system it is also called the large intestine. The large intestine or colon is shorter than the small intestine but has a larger diameter. The length of the colon is approximately 5 feet long.
In summary, 1  Both endoscopy and colonoscopy are the procedures to visualise the gastro intestinal path (Food canal). 2  The differences are endoscopy will be inserted from the mouth; colonoscopy will be inserted from the anus. 3  Unlike in colonoscopy, bowel preparation is not needed to do the endoscopy.
Endoscopy is often used to examine and treat parts of the digestive tract, such as: 1  Anoscopy views the inside of the anus, the very lowest part of the colon. 2  Colonoscopy views the inside of the colon (large intestine) and rectum.  Enteroscopy views the small intestine (small bowel).