human
My doctor says I need a colonoscopy. How does this work?
assistant
A colonoscopy is a procedure in which a doctor uses a thin, flexible tube called an endoscope to examine the inside of your colon. The doctor will insert the endoscope into your rectum and then slowly move it up through the colon. During the procedure, the doctor may take pictures or biopsies of any suspicious areas that are found. The entire procedure usually takes about 30 minutes.