because at the beginning they didn't know what to name it, so they named it innominate which means nameless or without a name.
2 Brachiocephalic vessels – Like humans, the fetal pig has two brachiocephalic (innominate) veins but only one brachiocephalic artery. The term brachiocephalic refers to the vessels' connections to the arm and head.
The brachiocephalic artery is the first major branch off of the aortic arch, it gives rise to the right internal carotid artery and the right subclavian artery. The brachiocephalic artery is also sometimes called the brachiocephalic trunk, and may also be called the innominate artery.
internal jugular and subclavian veins
Right and left brachiocephalic veins
brachiocephalic veins
Brachiocephalic
internal thoracic R/L, subclavian R/L, brachiocephalic R/L, external jugular R/L, internal jugular R/L, axilary R/L
Brachiocephalic veins and the vena azygos
To transport de-oxygenated blood to the lungs.
Blood goes from the vena cava into the right atrium of the heart
vertebral vein, , brachiocephalic vein
In the human, the brachiocephalic vein is formed by the union of the internal jugular and the subclavian vein on each side. In the cat, the brachiocephalic vein is formed by the union of the external jugular and the subclavian vein on each side.