human
My doctor has told me that I need to have a colonoscopy. What is a colonoscopy?
assistant
A colonoscopy is an examination of the colon, which is the large intestine. The colon is the part of the digestive system that absorbs water and nutrients from food and then sends them to the small intestine for further processing. The colonoscope is a long, thin, flexible tube that is inserted into the rectum. It allows doctors to look at the inside of the colon.