Which combining form denotes the kidney?

• A. Cardi/o
• B. Viscer/o
• C. Enter/o
• D. Nephr/o

Answer: (D)

Understanding how combining forms name body parts helps decode medical terms. The kidney is denoted by the combining form nephr/o, which comes from the Greek nephros meaning kidney. You’ll see this in terms like nephrology (study of the kidney) and nephron (the kidney’s functional unit). In contrast, cardi/o refers to the heart, viscer/o to internal organs in general, and enter/o to the intestine. So nephr/o is the combining form that denotes the kidney.