Urinary tract

The urinary tract, or urinary system, is a blanket term for a system of hollow organs serving to transport urine (a fluid bodily waste consisting of molecules filtered out from blood by kidneys) towards excretion out of the body. The process starts in the renal parenchyma where urine is filtered out of the blood and brought to the renal pelvis (the first urine storage). The ureter, a thin tube, helps to propels urine from the kidneys to the urinary bladder (the point of urine accumulation). The urethra is the last component of the urinary tract from which urine is passed to the outside of the body.