Four more fun facts for you!
1.About 8 million cells die in the human body every second and the same numbers are born in each second.
2.Red blood cells make approximately 250,000 round trips of the body before returning to the marrow they were born.
3.red blood cells may live for 4 months circulating thought the body, feeding 6 trillion other body cells.
4.Daniel Green's heart beated 26 times per. min., and it broke the world's record.