What brings O2 RICH blood out of the aorta to supply the heart?

• A. Right and left coronary arteries
• B. Pulmonary arteries
• C. Coronary sinus
• D. Aorta

Answer: (A)

The heart gets its own supply of oxygen through the coronary arteries. These arteries originate from the ascending aorta and branch to wrap around and invade the heart muscle, delivering oxygen-rich blood exactly where it’s needed to keep the myocardium working.

Pulmonary arteries are part of the lungs’ circulation and carry blood that’s low in oxygen away from the heart. The coronary sinus collects deoxygenated blood from the heart muscle and returns it to the right atrium, so it isn’t providing oxygen to the heart. The aorta carries oxygenated blood to the rest of the body, not directly to the heart muscle—its role is to distribute blood systemically, while the coronary arteries that branch from it specifically supply the heart tissue.