What artery supplies blood to the upper extremities?

The subclavian artery is the primary vessel responsible for supplying blood to the upper extremities. It branches off the aorta and travels laterally under the clavicle before continuing into the arm as the axillary and brachial arteries. This arterial pathway is essential for delivering oxygenated blood to the shoulders, arms, and hands, thus playing a vital role in the overall vascular system of the upper body.

In contrast, the carotid artery primarily supplies blood to the head and neck. The femoral artery is located in the thigh and is responsible for supplying blood to the lower extremities. The radial artery, although significant for the forearm and hand, branches from the brachial artery and does not serve as the main artery supplying the entire upper extremities. Therefore, the subclavian artery is clearly designated as the main source of blood supply to the upper limbs.