A procedure in which a flexible fiber-optic tube is passed through the patient's mouth to the stomach is called a ____.

A) colonoscopy
B) duodenoscopy
C) gastroscopy
D) proctoscopy
E) fluoroscopy

Gastroscopy

A diagnostic procedure using a gastrocope to visually examine the inner lining of the upper gastrointestinal tract, including the esophagus, stomach, and duodenum.

Fiber-Optic Tube

A flexible, thin tube made of glass or plastic fibers used to transmit light signals over long distances with minimal loss of strength.

Stomach

A muscular organ in the digestive system that processes food by secreting acid and enzymes.