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. Gastroscopy is a small part in endoscopy. Where endoscopy looks at all the structures of the human body from joint spaces to the lower intestines, gastroscopy only involves the upper GI tract. 2. Endoscopy may involve incisions made for an artificial orifice, and gastroscopy utilizes the natural opening: the mouth.