A neutrophil with a segmented nucleus (center and surrounded by erythrocytes), the intra-cellular granules are visible in the cytoplasm (Giemsa stained high magnification)
A basophil with lobed nuclei surrounded by erythrocytes
Granulocytes are a category of white blood cells characterized by the presence of granules in their cytoplasm. They are also called polymorphonuclear leukocytes because of the shape of the nucleus, which has three segments. The term polymorphonuclear leukocyte often refers just to neutrophils, the most abundant of the granulocytes.
Granulocytes are released from the bone marrow. They operate by phagocytosis and other means.