One of the five different types of (WBC) belonging to the subgroup of
WBCs called . Characterised by large red (i.e. eosinophilic) cytoplasmic
Eosinophil function is incompletely understood. They are prominent at sites of allergic reactions and with
parasitic larvae infections ( helminths ). Eosinophil secretory products inactivate many of the chemical
of inflammation and destroy cancer cells. This phenomenon is most obvious with mast cell-derived
produce a chemotactic factor for eosinophils.
Produced in the bone marrow, eosinophils then migrate to tissues throughout the body. When a foreign substance enters the
body, and release certain substances to attract eosinophils which release toxic substances to
kill the invader.