 electron microscopi cytoplasm inclus macrophag human tissu fine structur inclus cytoplasm macrophag human lung spleen skin lymph node rectum describ inclus appear concentr whorl lamella arrang core lamella construct discret parallel filament inclus resembl current describ virus viru-like particl resembl asbesto bodi atmospher pollut ingest resembl lipid phase system well mast cell granul inclus repres partial intracellular digest phagocyt tissu membran ingest mast cell granul differ similar exist inclus bodi macrophag granul mast cell variat alter mast cell granul morpholog macrophag ingest cytolog distinct macrophag laden mast cell granul mast cell proper remain obscur requir addit experiment evid clear electron microscop differenti cell type exact natur highli structur bodi remain specul 