Facts About the Renal System

  Each kidney has about 1,000,000 filtering units, called nephrons.

  Every 45 minutes, your whole blood supply passes through your
   kidneys.

  Roughly 40 gallons of blood in women and 48 gallons of blood in
   men are filtered each day.

  The color of your urine can reflect if you are drinking enough water;
    it is usually light yellow if you are drinking enough water and dark
    yellow if you are not.

  For someone with kidney failure, it typically takes 4 hours of dialysis, 
   3 times a week to perform the filtering duties of normal kidneys.

  The need to urinate is felt when about 1 cup of urine fills the bladder.