Random Fact #18

In 1 ml of blood there is approx 4,500,000,000 red blood cells.  In one red blood cell there is 250,000,000 hemoglobin molecules.  This means that there are 10,000,000,000,000,000,000 molecules of hemoglobin in one ml of blood.  Seeing that there are around 5 liters of blood in the body that equals a lot of zeros of hemoglobin.   The total weight off all this hemoglobin is around 1-2 pounds.