The urinary system is comprised of the kidneys, ureters, bladder, and the urethra. The purpose of the urinary system (also called the renal system) is to remove waste from the body and to regulate ...

The kidneys contain millions of microscopic blood vessels known as peritubular capillaries. These vessels recapture helpful nutrients like glucose and minerals and return them to your bloodstream for ...

Urinary retention is difficulty completely emptying the bladder. People with urinary retention may need to urinate very frequently, feel the urge to urinate again immediately after using the bathroom, ...