What does the prefix "endo-" mean in medical terms?

The prefix "endo-" in medical terminology signifies "within" or "inner." It is derived from the Greek word "endon," which translates to "inside." This prefix is commonly used to describe situations, structures, or processes that occur within a particular organ, tissue, or cell. For example, the term "endoscopy" denotes a procedure that involves examining the interior of a hollow organ or cavity using an instrument. Understanding the meaning of "endo-" aids in deciphering complex medical terms and clarifies the context in which they are applied in healthcare settings.