white blood cells are the leukocytes which are an important figure of the body's defense system.
they are divided into
Agranulocyte: their cytoplasm is clear and donot contain any granules in it.it includes lymphocytes and monocytes
granulocyte:their cytoplasm is rich in granule like structure which are basically the lysosomes.these lysosomes help the white blood cell to act upon other foreign agents,phagocytose or engulf them because of such characteristics of lysosomes.Examples are Eosinophil,Basophil,neutrophil.
All these WBC's can be recognised on the basis of staining method and the shape of their nucleus

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