What are the three branches of the arch of the aorta from left to right?

The correct answer is based on the anatomical structure of the arch of the aorta and its branches. The arch of the aorta has a distinctive branching pattern that starts from the heart and extends outward.

From left to right, the first branch that arises from the arch of the aorta is the brachiocephalic trunk. This vessel then bifurcates into the right common carotid and the right subclavian arteries, which supply blood to the right side of the head and arm, respectively. Following the brachiocephalic trunk, the next branch is the left common carotid artery, which supplies blood to the left side of the head. Finally, the left subclavian artery branches off from the arch to supply blood to the left arm.

Thus, the correct sequence of the three branches as they emerge from the arch of the aorta is indeed the brachiocephalic trunk, followed by the left common carotid artery, and lastly, the left subclavian artery. This anatomical knowledge is crucial for understanding cardiovascular circulation and is essential for students in mortuary science to know for their practice and studies.