RJV World

In terms of our blood vessel a facts that in the average of human body were put end to end, they would be 60,000 miles long. Less than 5 percent of people in other country donate bloods. Every year over 23 millions pints of blood are used in transfusion. An adult male has about 12 pints of blood in his body, while an adult female has about 9 pints. In frozen, red blood cells can last up to 10 years. Two or three drops of blood contain about 1 billion red bloods cells. These cells live only for about four months. The body’s bone marrow continually produces new red blood cells. White blood cells fight bacteria and viruses. These are twice as many white cells as red cells in the bone marrow, but they’re only a small amount of white cells for every 600 red cells in the bloodstream.