There are two the superior (from the head) and inferior (from the body) vena cava.
both the superior and inferior vena cava pump the blood into the right atrium. Then, the right atrium pumps the blood through a valve, and into the right ventricle.
oxygenated blood
The superior vena cava conducts blood from the head to the right atrium.
Blood that comes in to the right atrium comes from the pulmonary vein.
capilaries
th blood vessel that goes to the right atrium is cava
coronary sinus
The Superior and inferior vena cava.
The superior vena cava
blood first enters the heart through the right atrium.
vena cava (superior and inferior)
Deoxygenated blood returns to the heart from the rest of the body via the inferior vena cava which brings blood from the lower half of the body and the superior vena cava which brings blood from the upper half of the body. The inferior and superior vena cava join at the right atrium of the heart.