An endoscope is a medical instrument used to examine the interior of a body cavity or organ. It consists of a long, flexible tube with a light and camera at the end, allowing doctors to visualize areas such as the esophagus, stomach, and intestines. Endoscopes can also be equipped with tools for taking biopsies or removing tissue. Endoscopy is a minimally invasive procedure, meaning it often requires only small incisions or no incisions at all. This technique is commonly used for diagnosing conditions, monitoring diseases, and performing certain treatments, making it a valuable tool in modern medicine.