What is the function of the inferior vena cava?

The function of the inferior vena cava is to return deoxygenated blood from the lower parts of the body, such as the legs, pelvis, and abdomen, back to the heart. It collects blood from various veins that drain the lower regions and channels it into the right atrium of the heart. This is a crucial part of the circulatory system, as it ensures that blood can be re-oxygenated in the lungs after the body has utilized the oxygen. Understanding this function underscores the importance of proper venous return and how it supports overall heart function and circulation.