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Well the answeris:(1)osmoregulation:balance btwn water and salt in the body

(2)excretion:removal of metabolic waste product from the body in form of urine.

(3)acid-base balance:when the bodys fluid becomes acidic very conc.,more acid is removed by urine.excess loss of base is prevented at the same time by the kidney.

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14y ago

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13y ago

They clean your blood by removing toxins and putting them in your urine

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Q: What is the kidneys purpose?
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