What is the name of the lensed device used for viewing the interior of a body cavity?

The correct answer is an endoscope, which is a versatile lensed device specifically designed to visualize the interior of body cavities and organs. Endoscopes come in various forms, including those used for specific areas such as the gastrointestinal tract, respiratory passages, and more. They allow healthcare providers to diagnose and sometimes treat conditions without the need for open surgery, enhancing patient safety and recovery times.

Other choices, while related to medical procedures involving visualization, serve more specific purposes. A laparoscope is a type of endoscope specifically designed for intra-abdominal procedures, used during minimally invasive surgeries like laparoscopic cholecystectomies. A colonoscope is specialized for examining the colon and rectum. A stethoscope, on the other hand, is an acoustic device used to listen to internal body sounds, particularly the heart and lungs, rather than for visual inspection. Therefore, the breadth of use and functionality uniquely qualifies the endoscope as the correct answer to describe a device for viewing the interior of body cavities.