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Multiple Choice
Which of the following arteries is NOT a direct branch of the aorta?
A
Brachiocephalic trunk
B
Left subclavian artery
C
Renal artery
D
Right subclavian artery
Verified step by step guidance
1
Step 1: Begin by understanding the anatomy of the aorta, which is the largest artery in the body. It originates from the left ventricle of the heart and branches into several major arteries to supply blood to the body.
Step 2: Identify the direct branches of the aorta. The three main branches of the aortic arch are the brachiocephalic trunk, the left common carotid artery, and the left subclavian artery. Additionally, the descending aorta gives rise to branches such as the renal arteries.
Step 3: Examine the options provided in the question. The brachiocephalic trunk and left subclavian artery are direct branches of the aorta. The renal arteries are branches of the descending aorta, which is also part of the aorta.
Step 4: Understand the anatomy of the right subclavian artery. It is not a direct branch of the aorta. Instead, it arises from the brachiocephalic trunk, which is a direct branch of the aorta. This distinction is key to answering the question.
Step 5: Conclude that the right subclavian artery is NOT a direct branch of the aorta, as it originates from the brachiocephalic trunk rather than directly from the aorta itself.