What Are the Functions of White Blood Cells?

There are five different types of white blood cells, including neutrophils, lymphocytes, monocytes, eosinophils and basophils. The lack of white blood cells, or the incidence of too many can cause serious disorders in the body. Disorders are more common regarding neutrophils and lymphocytes. A common disorder from a lack of white blood cells is called leukopenia. The presence of leukopenia can make a person much more susceptible to infections and contagious diseases.