Caption

Kidney. Computer graphic image showing a normal human kidney. The two kidneys are the organs responsible for filtering the blood and excreting waste products and excess water in the form of urine. The two sectioned vessels seen at centre left are the renal artery and vein which provide the kidney with its blood supply. The ureter is seen at bottom left; it conveys the waste fluid (urine) into a storage sac known as the bladder.