Which term describes the meaning of the prefix endo- in medical terminology?

Which term describes the meaning of the prefix endo- in medical terminology?

• A. Outside
• B. Between
• C. Around
• D. Inside

Answer: (D)

Endo- denotes within, inside. It comes from Greek endon meaning within, inner. In medical terms you see endo- in words like endoscope (an instrument to view inside the body), endometrium (the inner lining of the uterus), and endocardium (the inner lining of the heart). Because it means inside, the interpretation that matches this prefix is Inside. The other options describe locations outside (outside), between (between), or around (around) and don’t reflect the meaning of endo-.

Endo- denotes within, inside. It comes from Greek endon meaning within, inner. In medical terms you see endo- in words like endoscope (an instrument to view inside the body), endometrium (the inner lining of the uterus), and endocardium (the inner lining of the heart). Because it means inside, the interpretation that matches this prefix is Inside. The other options describe locations outside (outside), between (between), or around (around) and don’t reflect the meaning of endo-.