Why Kidneys are Essential

Every day, the kidneys filter about 120 to 150 quarts of blood to produce about 1 to 2 quarts of urine, composed of wastes and extra fluid. This natural flushing helps to keep levels of electrolytes stable, such as sodium, potassium, and phosphate. The kidneys make red blood cells and also make hormones that help to regulate blood pressure, and help bones stay strong.

-- https://www.nyp.org/patients-and-visitors/advances-consumers/issues/kidneys-the-original-self-cleaning-system