Help me to answer this question please!?

Question

Explain why it is vital for kidneys to put fluid back into the blood.

Answer 1

The kidneys are complicated organs that have numerous biological roles. Their primary role is to maintain the homeostatic balance of bodily fluids by filtering and secreting metabolites (such as urea) and minerals from the blood and excreting them, along with water, as urine.

Blood plasma is makes up 55 percent of the fluids on the body. 90% of blood is made up of basic water. In basic terms the Kidney filters out the bad "stuff" and replenishes it back into the blood to stay healthy.

Hope this helps my friend.

Answer 2

The kidneys of vertebrates have the vital function of removing metabolic wastes from the blood and otherwise maintaining its normal composition. The two kidneys of a normal human adult produce 1 to 2 liters (about 30 to 70 fluid ounces) of urine each day that contain wastes, excess water, and other unneeded molecules. Production of less than 0.4 liter (13.5 fluid ounces) of urine per day is insufficient to eliminate wastes and regulate the composition of blood. Such a condition is always fatal within a few weeks unless the underlying cause is corrected, a new kidney is transplanted, or the blood is artificially cleared by dialysis.