human
My doctor says I need a colonoscopy. How does it work?
assistant
A colonoscopy is an endoscopic procedure that uses a thin, flexible tube called a colonoscope to examine the inside of your colon (large intestine). It’s performed by a gastroenterologist, who inserts the colonoscope through your rectum and into your colon. The scope then sends images of the inside of your colon to a monitor, allowing the doctor to see any polyps or other abnormalities. After the exam, the doctor removes the scope and cleans your insides with water.