part_of part of part of connected to anterior vena cava vein brachiocephalic vein innominate vein EHDAA2:0000182 SCTID:181371003 The left and right brachiocephalic veins in the upper chest are formed by the union of each corresponding internal jugular vein and subclavian vein. This is at the level of the sternoclavicular joint. These great vessels merge to form the superior vena cava. The brachiocephalic veins are the major veins returning blood to the superior vena cava. innominate vein MESH:D016121 EHDAA:9868 UBERON:0003711 innominate veins innomiate vein FMA:4723 innominate trunk galen:BrachiocephalicVein brachiocephalic venous tree Wikipedia:Brachiocephalic_vein NCIT:C32816 GAID:529 brachiocephalic vasculature