An endoscope is an illuminated optical, typically slender and tubular instrument 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 includes cystoscope (bladder), nephroscope (kidney), bronchoscope (bronchus), arthroscope (joints) and colonoscope (colon), laparoscope(abdomen or pelvis). It can be used to examine visually and diagnose, or assist in surgery such as an arthroscopy.