What about Eosinophils? Eosinophils are essentially those cells, those granulocytes that are involved not only in allergic reactions, but also in destroying and killing off parasites and dealing with parasitic infections. And finally, we also have basicils. Now basicils contain special chemicals. For example, histamines found within those granules, the secretary vesicles, inside the cytoplasm. And these histamines are involved in initiating the process of inflammation, a type of protection that we have in our innate immune system, in the non specific immune system.