Which vessels supply blood to the head? To the upper limb? To the abdominal wall? To the lower limb?

Brain structures, head, and neck are mainly blood supplied by branches of the subclavian and common carotid arteries. The main branches of the subclavian artery are the vertebral arteries, thyrocervical arteries, and costocervical arteries. In the cranial cavity, the vertebral artery unites with the opposite vertebral artery to form the basilar artery, which gives rise to branches leading to the pons, midbrain, and cerebellum. The basilar artery divides into two posterior cerebral arteries that supply occipital and temporal lobes of the cerebrum. The thyrocervical arteries give off numerous branches to supply neck viscera. The costocervical arteries supply blood muscles in the neck, back, and thoracic wall. The left and right carotid common carotid arteries divide to form external and internal carotid arteries. The external carotid artery gives off branches to structures in the neck, face, jaw, scalp. The internal carotid is responsible for supplying blood to the anterior part of the brain, the eye, and its appendages, and sends branches to the forehead and nose. The internal carotid artery branches to form two major cerebral arteries, the anterior cerebral artery (supplies the medial surface of the brain) and middle cerebral artery (supplies lateral surface of the cerebrum). Upper limb receives blood supply from the axillary artery, the brachial artery, the ulnar artery, and the radial artery. Anterior abdominal wall receives blood supply from the internal thoracic artery (a branch of the subclavian artery) and the internal iliac artery (a branch of the common iliac artery), whereas the posterior and lateral abdominal walls receive blood supply from the phrenic and lumbar arteries. Muscles and skin of the lower abdominal wall receive blood from the inferior epigastric and deep circumflex iliac artery (branches of the external iliac artery). Lower limbs receive blood supply from the external iliac, the femoral, the popliteal, the anterior and posterior tibial, and the fibular arteries.