What is the function of coronary veins?

What is the function of coronary veins?

• A. They drain deoxygenated blood from the heart muscle back to the right atrium.
• B. They supply oxygenated blood to the heart muscle from the aorta.
• C. They drain deoxygenated blood from the lungs to the left atrium.
• D. They return blood from the body to the right ventricle.

Answer: (A)

Coronary veins drain the heart muscle's used blood back toward the heart. After oxygen is delivered to the myocardium and waste products are picked up, the deoxygenated blood collects in these veins and flows into the coronary sinus, which then empties into the right atrium. From there, the blood moves to the right ventricle and onward to the lungs for re-oxygenation. This is distinct from how the arteries supply oxygenated blood to the heart, or how the lungs donate oxygenated blood to the left atrium, or how most body veins return blood to the right side of the heart. So the main function is to remove deoxygenated blood from the heart muscle and return it to the right atrium.

Coronary veins drain the heart muscle's used blood back toward the heart. After oxygen is delivered to the myocardium and waste products are picked up, the deoxygenated blood collects in these veins and flows into the coronary sinus, which then empties into the right atrium. From there, the blood moves to the right ventricle and onward to the lungs for re-oxygenation. This is distinct from how the arteries supply oxygenated blood to the heart, or how the lungs donate oxygenated blood to the left atrium, or how most body veins return blood to the right side of the heart. So the main function is to remove deoxygenated blood from the heart muscle and return it to the right atrium.