Endoscopy is a medical procedure that employs a thin, flexible tube with a light and camera attached to it, known as an endoscope, to visually examine the inside of a person's body. This procedure is commonly used to diagnose and treat various conditions in the digestive system, respiratory tract, urinary tract, and other organs. Endoscopy allows doctors to detect abnormalities, take tissue samples for biopsy, remove polyps, and perform certain treatments without the need for surgery. It is a minimally invasive and relatively safe procedure that is crucial for accurate diagnosis and treatment of many medical conditions.