What is vena cava? Which type of blood circulates within the vena cava?
The vena cava are either of two large veins that debouch into the right atrium. The superior vena cava drains all blood that comes from the head, the superior limbs, the neck and the superior portion of the trunk. The inferior vena cava carries blood drained from the inferior portion of the trunk and the inferior limbs. Venous blood circulates within the vena cava.
