What does the prefix "endo-" refer to?

The prefix "endo-" originates from the Greek word "endon," meaning "within." In medical terminology, it is commonly used to describe structures or processes that occur inside an organ or structure. For instance, "endoscopy" refers to a procedure involving the use of an endoscope to examine the interior of a hollow organ. This prefix is crucial for healthcare professionals as it helps in accurately describing diagnostic procedures, diseases, and anatomical structures. The other prefixes provided pertain to entirely different concepts: "above," "excessive," and "slow," which have no relation to the idea of being within something. Understanding these prefixes is essential for effective communication in medical settings.