एखाद्या व्यक्तीच्या पाचन तंत्राचे परीक्षण करण्यासाठी वापरल्या जाणाऱ्या उपकरणाला ________ म्हणतात.

An endoscope is a thin, flexible tube with a light and camera that doctors pass into the body to examine the digestive tract. An oscilloscope displays electrical signals, and a radiograph is an X-ray image.