ANATOMY

Detailed explanation-1: -Blood flows into your kidney through the renal artery. This large blood vessel branches into smaller and smaller blood vessels until the blood reaches the nephrons. In the nephron, your blood is filtered by the tiny blood vessels of the glomeruli and then flows out of your kidney through the renal vein.

Detailed explanation-2: -The right renal artery originates from the anterolateral aspect of the aorta and runs in an inferior course behind the inferior vena cava to reach the right kidney, while the left renal artery originates slightly higher and from a more lateral aspect of the aorta, and runs almost horizontally to the left kidney.

Detailed explanation-3: -The renal arteries branch off of the abdominal aorta and supply the kidneys with blood. The arterial supply of the kidneys varies from person to person, and there may be one or more renal arteries to supply each kidney. The renal veins are the veins that drain the kidneys and connect them to the inferior vena cava.

Detailed explanation-4: -The main renal veins empty into the inferior vena cava; the left renal vein is three times longer than the right (7.5 cm versus 2.5 cm). The left renal vein traverses behind the splenic vein and body of the pancreas before it crosses in front of the aorta near its termination in the inferior vena cava.