Question

Which blood vessel takes blood away from kidney?

• A. Renal portal vein
• B. Renal vein
• C. Afferent arteriole
• D. Efferent arteriole

Answer 1

Answer: (B)

Renal vein

The renal vein takes blood away from the kidney. The process starts with the renal artery which enters the kidney as afferent arteriole. It carries the urea loaded blood into the glomerulus of the kidney. The blood is filtered by the glomerulus into the Bowman's capsule and runs parallel to the Loop of Henle. The urea is absorbed into the nephric filtrate by the process of tubular secretion in the loop of Henle, distal convulated tubule and collecting duct. The process of tubular secretion helps to secrete the urea from the blood to the collecting duct which is finally excreted in form of urine. The purified blood comes from the kidney through the renal vein and drained into venacava outside kidney.

So, the correct answer is 'Renal vein'.