Functions of the Urinary system.
Kidneys filter urea, salts and excess water from the blood.
After the waste materials are filtered by the kidneys, they combine to form urine.
Urine flows out of the kidney through the ureters into the urinary bladder.
The bladder acts as a temporary store of urine. When it gets full, one feels the urge to pass out urine through a process called urination.
Urine flows from the bladder into the urethra and out of the kidney.
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