Endoscope

An endoscope is an illuminated optical, typically slender and tubular instrument (a type of borescope) used to look deep into the body and used in procedures called an endoscopy. "Endo" is Greek for "within" while "scope" comes from the Greek word "skopos" meaning to target or look out. It is used to examine the internal organs like the throat or esophagus. Specialized instruments are named after their target organ. Examples include the cystoscope (bladder), nephroscope (kidney), bronchoscope (bronchus), arthroscope (joints) and colonoscope (colon), and laparoscope (abdomen or pelvis).[1] They can be used to examine visually and diagnose, or assist in surgery such as an arthroscopy.

A flexible endoscope

Drawings of Bozzini's "Lichtleiter", an early endoscope