The brachiocephalic veins are major blood vessels located in the upper chest. They are formed by the merging of the internal jugular vein and the subclavian vein on each side of the body. There are two brachiocephalic veins: the right and the left. They play a crucial role in draining blood from the head, neck, and upper limbs back to the heart. Each brachiocephalic vein travels toward the heart, where they converge to form the superior vena cava. This vessel then carries deoxygenated blood to the right atrium of the heart. The brachiocephalic veins are essential for maintaining proper blood circulation in the upper body.