There are 150 billion red blood cells in one ounce of blood

There are 2.4 trillion red blood cells in one pint of blood

The human body malfunctures 17 million red blood cells per second. If stress precipices a need the body can produce up to seven times that amount. (119 million red cells per second)

A red cell is around seven microns in size, which is one million of a meter

It takes twenty to sixty second for a drop of blood to travel from the heart, through your body and back to the heart again

The most common blood type in the US is O positive, which is 39% of the population.

While the least common is AB negative type, being at zero point five percent

Patients in the US use around 32,000 pints of blood every day

All blood isn't red. Crabs have blue. Earth worms and leeches have green. Invertebrates-like starfish-have clear/yellow