The subclavian artery is a major blood vessel that supplies oxygenated blood to the upper limbs and parts of the neck and head. It branches off from the aorta on the left side and from the brachiocephalic trunk on the right side. The artery runs beneath the clavicle, or collarbone, and is crucial for delivering blood to the arms. As it travels, the subclavian artery gives rise to several important branches, including the vertebral artery, which supplies blood to the brain, and the internal thoracic artery, which supplies the chest wall. Proper functioning of the subclavian artery is essential for maintaining adequate blood flow to the upper body.