They are most commonly found in promyelocyte stage of neutrophilic precursors. They are primary lysosomes which contain myeloperoxidase and acid hydrolases characteristic of lysosomes. Functions First line of defense against microorganisms, especially bacteria. Killing and digestion occur. Activated oxygen species also form and kill microorganisms.
Lysozyme destroys cell wall of gram-positive bacteria.
Neutrophils undergo chemotaxis. They are attracted by devitalized tissue, bacteria, foreign bodies, and complement components. Phagocytosis can be non-specific but will be enhanced if body has made specific antibodies due to previous exposure. The eosinophil generally contains a bilobed nucleus however, three to four lobes are noted occasionally. These structures are known as crystalloids.