How much does the normal kidney hold?

A normal kidney typically contains about 1 to 1.5 liters of blood at any given time, as it processes around 20-25% of the body's blood supply. In terms of urine production, a healthy kidney can produce about 800 to 2,000 milliliters of urine per day, depending on fluid intake and other factors. The kidneys also filter about 50 gallons (approximately 190 liters) of blood daily, reabsorbing essential substances and excreting waste.