Blank is a diagnostic procedure preformed by a gastroenterologist. The doctor uses a long, thin tube that has a tiny video camera at the end. The doctor has to be skilled to guide the tube into the GI tract.

Colonoscopy

Explanation:

When performing colonoscopy, the gastroenterologist uses a long, thin, flexible tube with a tiny video camera and a light on the end — called the colonoscope — to view the entire colon and rectum and check for polyps, inflammatory changes or cancer.

well i’m not to well in health but if the body produces more standard fat then the fat will convert most of it into energy and give all the muscles nutrients (sorry if it was wrong