Label the following parts of the urinary system:
1-Kidney, 2-Ureter, 3-Urinary bladder, 4-Urethra
The urinary system in humans consists of a pair of kidneys. The corresponding pair of ureters collect the urine formed and move it to a urinary bladder. The urinary bladder stores urine until it can be excreted out through a tube called the urethra.