Which blood vessel drains blood from the kidney to the body?

The renal vein is responsible for draining blood from the kidneys and returning it to the systemic circulation. After the kidneys filter blood to remove waste products and regulate various bodily functions, the purified blood is collected by the renal vein. This vessel transports the clean, oxygenated blood away from the kidneys and ultimately connects to the inferior vena cava, which carries the blood back to the heart. This process is essential for maintaining blood composition and homeostasis within the body.

In contrast, the renal artery carries unfiltered blood from the heart to the kidneys for purification, while the ureter serves as a conduit for urine, not blood, moving it from the kidneys to the bladder. The aorta, on the other hand, is the largest artery in the body and delivers oxygen-rich blood from the heart to all body parts, but it does not specifically drain blood from the kidneys.