What are the main coronary arteries?

What are the main coronary arteries?

• A. Right Coronary Artery and Left Coronary Artery
• B. Superior and Inferior Coronary Arteries
• C. Pulmonary Artery and Aorta
• D. Internal Thoracic Arteries

Answer: (A)

The main coronary arteries are the right coronary artery and the left coronary artery. They originate from the aorta just above the aortic valve and supply blood to the heart muscle itself. The left coronary artery (often called the left main) quickly divides into branches that nourish the front and lateral walls of the left ventricle and part of the septum. The right coronary artery courses along the right atrioventricular groove, supplying the right heart and often contributing to the posterior part of the heart. Other vessels mentioned aren’t the coronary arteries. The pulmonary artery carries blood from the heart to the lungs, the aorta distributes blood to the body, and the internal thoracic arteries supply the chest wall (and can be used as bypass grafts), not the heart muscle as the primary coronary arteries do.

The main coronary arteries are the right coronary artery and the left coronary artery. They originate from the aorta just above the aortic valve and supply blood to the heart muscle itself. The left coronary artery (often called the left main) quickly divides into branches that nourish the front and lateral walls of the left ventricle and part of the septum. The right coronary artery courses along the right atrioventricular groove, supplying the right heart and often contributing to the posterior part of the heart.

Other vessels mentioned aren’t the coronary arteries. The pulmonary artery carries blood from the heart to the lungs, the aorta distributes blood to the body, and the internal thoracic arteries supply the chest wall (and can be used as bypass grafts), not the heart muscle as the primary coronary arteries do.