Question

How is urine 95% water if kidney only takes out impurities?

Answer 1

osmolarity

Explanation:

the kidney should also maintain the concentration of salt and water in the body. if the salt intake is low and water intake is high, dilute urine will result. if the salt is high and water is low, concentrated urine will result

Answer 2

The kidneys also separate water from the blood to be used to efficiently flush the impurities out of the body.