White Blood Cells

  • White blood cells are the body's defense against bacteria and viruses.
  • In the bone marrow where they are produced, they outnumber red blood cells by 2 to 1.
  • In the blood stream there are about 600 red blood cells for every white blood cell.
  • There are many different types of white blood cells and each has a different function in fighting infection.
  • White blood cells are bigger than red blood cells and can change shape easily.
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