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Etta217
The pair of purplish-darker organs is situated beneath the ribs toward the center of the back. Their capacity is to expel fluid waste from the blood as pee; keep a steady adjust of salts and different substances in the blood; and deliver erythropoietin, a hormone that guides the arrangement of red platelets.

Answer:

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

Explanation:

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