Which prefix indicates within?

Which prefix indicates within?

• A. Exo-
• B. Epi-
• C. Endo-
• D. Trans-

Answer: (C)

Within is what endo- signals in medical terminology. It denotes internal, inner, or inside. You can see it in words like endoscope, a tool used to look inside the body; endocardium, the inner lining of the heart; and endometrium, the lining of the uterus. By contrast, exo- means outside, epi- means upon or on, and trans- means across or through. Because endo- specifically conveys the idea of being inside or within, it is the prefix that indicates within.

Within is what endo- signals in medical terminology. It denotes internal, inner, or inside. You can see it in words like endoscope, a tool used to look inside the body; endocardium, the inner lining of the heart; and endometrium, the lining of the uterus. By contrast, exo- means outside, epi- means upon or on, and trans- means across or through. Because endo- specifically conveys the idea of being inside or within, it is the prefix that indicates within.