What is the function of the superior vena cava?

According to Healthline, the function of the superior vena cava is to carry spent, deoxygenated blood from the rest of the body to the right atrium of the heart. The right atrium then releases the blood into the right ventricle, which pumps it to the lungs to be oxygenated.

Healthline states that the superior vena cava is a short but very wide vein, the last blood vessel before the heart, carrying all the blood from everywhere else in the body. It is formed from the junction of the right and left brachiocephalic veins, which carry blood from the upper part of the body.