Which of the following blood vessels is a direct branch of the ascending aorta?

• A. Right coronary artery
• B. Left common carotid artery
• C. Left subclavian artery
• D. Brachiocephalic trunk

Answer: (A)

Verified step by step guidance

1. Understand the anatomy of the ascending aorta: The ascending aorta is the first portion of the aorta that emerges from the left ventricle of the heart. It gives rise to coronary arteries that supply blood to the heart itself.
2. Identify the direct branches of the ascending aorta: The ascending aorta specifically gives rise to the right coronary artery and the left coronary artery. These arteries are responsible for supplying oxygenated blood to the myocardium (heart muscle).
3. Differentiate between the branches of the ascending aorta and the aortic arch: The aortic arch, which follows the ascending aorta, gives rise to the brachiocephalic trunk, left common carotid artery, and left subclavian artery. These vessels supply blood to the head, neck, and upper limbs.
4. Focus on the correct answer: Among the options provided, the right coronary artery is the only direct branch of the ascending aorta. The other options (left common carotid artery, left subclavian artery, and brachiocephalic trunk) are branches of the aortic arch.
5. Conclude the reasoning: Based on anatomical knowledge, the correct answer is the right coronary artery because it directly originates from the ascending aorta, while the other vessels originate from the aortic arch.