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.
Answers. 1  Whatâs the difference between a screening and a diagnostic colonoscopy? 2  A screening test is a test provided to a patient in the absence of signs or symptoms. 3  Diagnostic colonoscopy is a test performed as a result of an abnormal finding, sign or symptom (such as abdominal pain, bleeding, diarrhea, etc.).