List the parts of the urinary system and describe the function of each one.

Kidneys:remove waste from the blood in the form of urine, keeps substances stable in the blood, and to make vitamin D active

The 2 ureters: these narrow tubes carry urine from the kidneys to the bladder

Bladder:the bladders’ walls relax and expand to store urine, and contract and flatten to empty urine through the urethra

The 2 sphincter muscles:they are circular muscles that keeps urine form leaking by closing tightly like a rubber band around the opening of the bladder

The nerves in the bladder: the nerves alert a person when it is time to urinate of empty the bladder

Urethra: this tube allows bladder to pass outside the body

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