THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Finally, the left subclavian artery comes off of the aortic arch to the left of the left common carotid artery and ascends, with the left common carotid, through the superior mediastinum and along the left side of the trachea.

Detailed explanation-2: -The left common carotid artery is the second branch of the aortic arch, which supplies blood to the left side of the head of the neck. The last branch of the aortic arch is the left subclavian artery that distributes blood to the left arm.

Detailed explanation-3: -The left common carotid artery is the second and longest branch of the aortic arch; it ascends from the apex of the arch to the left carotid bifurcation in the neck, which typically occurs between the third and fourth midcervical vertebral bodies.

Detailed explanation-4: -The medial area of the arch, between the brachiocephalic trunk and the left common carotid artery, arises from the left fourth aortic arch. The portion of the arch distal to the left common carotid artery arises from the dorsal aorta. The descending aorta arises from the dorsal aortae.