The brachiocephalic artery (or brachiocephalic trunk) is an artery of the mediastinum that supplies blood to the right Arm and the Head and Neck. It was previously known as the innominate artery, meaning unnamed artery. It is the first branch of the aortic arch. Soon after it emerges, the brachiocephalic artery divides into the right common carotid artery and the right subclavian artery. There is no brachiocephalic artery for the left side of the body. The left common carotid, and the left subclavian artery, come directly off the aortic arch. However, there are two brachiocephalic veins.[from Wikipedia]
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