THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The posterior auricular artery is a smaller muscular artery that branches from the external carotid artery. This artery travels to the region posterior to the ear. The function of the posterior auricular artery is to perfuse the scalp and the ear.

Detailed explanation-2: -The vascular supply to the scalp comes from the common carotid artery, posterior intercostal arteries, and the terminal branches of the subclavian artery.

Detailed explanation-3: -The posterior auricular artery is the superficial, preterminal branch of the external carotid artery. It mainly overlies the temporal bone, extending posterior to the parotid gland and auricle. The posterior auricular artery gives off five branches in total.

Detailed explanation-4: -Blood supply. The occipital artery helps supply blood to the dura mater, the auricle, the sternocleidomastoid, and the deep posterior muscles of the back.