If one views a granulocyte under a microscope, one can observe dense intracytoplasmic granules. The granules contain inflammatory mediators and digestive enzymes that destroy invading pathogens, control the rate and pathway of migration of chemotactic cells, and cause dilation of blood vessels at the infected site. The increased blood flow ensures that an ample supply of granulocytes and inflammatory mediators reaches the site of infection. There is a family of granulocytic cells, each member with its own specialized function. Under microscopic examination, some granulocytes are seen to be multinuclear and some mononuclear. The configuration of the nuclear region and the staining behavior provide ways of classifying granulocytes.
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