Thursday, December 8, 2011

Vena Cava

The vena cava is a large blood vessel which leads directly into the right atrium of the heart, carrying deoxygenated blood from the rest of the body. It is composed of two branches: the superior and inferior vena cava. The superior vena cava is a short thick blood vessel that arises from the junction of the right and left innominate veins. The inferior vena cava is a long vein which originates at the junction of the left and right common iliac veins in the lower abdomen, and then runs up parallel to the vertebral column, on its right side, entering the right atrium on its lower right side.