Which term refers to the arteries supplying the heart muscle?

• A. Dorsal
• B. Diplopia
• C. Coronary
• D. Disc

Answer: (C)

Coronary refers to the arteries that supply the heart muscle. The heart relies on a constant blood supply delivered by the coronary arteries, which arise from the aorta just above the aortic valve and branch to nourish the myocardium. The main vessels are the left and right coronary arteries, with branches like the left anterior descending and circumflex arteries feeding different regions of heart tissue. When these arteries narrow or become blocked, the heart muscle can’t get enough oxygen, leading to chest pain or a heart attack. The other terms describe different structures or conditions—dorsal means the back, diplopia is double vision, and a disc can refer to a spinal or optic disc—so they don’t describe the heart’s blood supply.