The superior and inferior are collectively called the '''venae cavae'''. They are the
Vein s that return de-oxygenated
Blood from the body into the
Heart . They both empty into the right
Atrium .
The
Inferior Vena Cava (or posterior vena cava) travels up alongside the abdominal
Aorta with blood from the lower part of the body.
The
Superior Vena Cava (or anterior) is above the heart, and forms from a convergence of the left and right
Brachiocephalic Vein s that contain blood from the head and the arms. The vena cavae carry deoxygenated blood from the body to the right atrium of the heart.
The venae cavae is the largest blood vessel in the heart.