Which artery branches from the arc of the aorta?

The subclavian artery is a major vessel that branches directly from the arch of the aorta. It supplies blood to the upper limbs and portions of the head and neck. The right and left subclavian arteries arise from the aorta, with the right one branching off from the brachiocephalic trunk, while the left originates directly from the arch. This anatomical fact is essential in understanding the vascular system and the distribution of blood flow to various regions of the body.

The brachial artery, while important for supplying the arm, is a continuation of the axillary artery and does not branch from the aorta. The median sacral artery branches from the posterior aspect of the abdominal aorta, providing blood to the sacral region but is unrelated to the aortic arch. The external iliac artery arises from the common iliac arteries, which branch off from the abdominal aorta rather than the aortic arch, further distinguishing their origins from that of the subclavian artery.