PATHOLOGY

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: -After the kidneys have performed their cleansing function, the filtered, deoxygenated blood leaves the kidneys through the renal vein, moves up the inferior vena cava, and returns to the heart.

Detailed explanation-3: -As blood passes through the nephron, fluid and waste products are filtered out. Much of the fluid is then returned to the blood, while the waste products are concentrated in any extra fluid as urine (wee). The urine flows through a tube called the ureter into the bladder.