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.
1 There is colonoscopy (whole colon), sigmoidoscopy (rectum and last 2 feet of colon), proctoscopy (just the rectum), and anoscopy (just the anus). 2  For colorectal cancer screening, total colonoscopy is by far the best. 3  Its downside is the prep and the cost.