Phagocytic cells important in the body\'s defense against parasitic worms Monocytes Eosinophils M cells Red blood cells Solution Eosinophils both eosinophils and monocytes are types of WBC. monocytes differentiate into macrophages. these are effective immune cells that act against or engulf foreign particles and microbes. eosinophils function include movement to areas with inflammation, antiparasitic and also bactericidal, and participate in allergic reactions..