The urinary system consists of the kidneys, ureters, urinary
bladder, and urethra. The kidneys form
the urine and account for the other functions
attributed to the urinary system. The ureters carry the urine away from
kidneys to the urinary bladder, which is a temporary reservoir for the urine.
The urethra is a tubular structure that carries the urine from the urinary
bladder to the outside.
Source: US National Cancer Institute