The subclavian arteries are major blood vessels that supply oxygenated blood to the upper limbs and parts of the neck and head. Each person has two subclavian arteries, one on the left and one on the right, branching off from the aorta and the brachiocephalic trunk, respectively. These arteries travel beneath the clavicle, or collarbone, and give rise to several important branches, including the vertebral artery, which supplies blood to the brain. The subclavian arteries play a crucial role in maintaining proper blood flow to the arms and upper body.