Question

there are 3 branches off the aortic arch. place the appropriate 3 branches in order.
right coronary a.
right subclavian a.
left common carotid a.
left external carotid a.
brachiocephalic trunk
left subclavian a.
left internal carotid a.
right common carotid a.
first branch
second branch
third branch
reset

Explanation:

The aortic arch has three main branches. The first branch is the Brachiocephalic trunk. The second branch is the Left common carotid artery. The third branch is the Left subclavian artery. This order is based on the anatomical structure of the aortic arch.

Answer:

First branch: Brachiocephalic trunk
Second branch: Left common carotid a.
Third branch: Left subclavian a.