White Blood Cells

White blood cells, or leukocytes, detent the body against foreign organisms. They are almost colorless, are considerably larger than red cells, have a nucleus, and are much less numerous; only one or two exist for every 1,000 red cells. The number increases in the presence of infection.There are three types; granulocytes, lymphocytes, and monocytes. Granulocytes, accounting for about 70 percent