<Li> Contributes to the production of red blood cells by the kidney . </Li> <Li> Helps synthesize calcitrol the (active form of Vitamin D). </Li> <Li> Stores waste product (mainly urea and uric acid) before it and other products are removed from the body . </Li> <P> Average urine production in adult humans is about 1--2 litres (L) per day, depending on state of hydration, activity level, environmental factors, weight, and the individual's health . Producing too much or too little urine requires medical attention . Polyuria is a condition of excessive urine production (> 2.5 L / day). Oliguria when <400 mL (millilitres) are produced, and anuria one of <100 mL per day . </P>

Where is the kidneys located in the female body