And heparin just like the mast cell. And that once again dilates our blood vessel, makes our capillaries more leaky so that there is a higher flow of fluid into our tissue and it also decreases the ability of our blood to actually clot itself and that increases the flow of our blood as a result. So these eosinophils also are found in high concentration when we have some type of allergic reaction if this pathogen is an allergen or if it is some type of parasite. Now, another type of innate immune cell is the natural killer cell. Now, these natural killer cells as shown the following diagram basically have a special receptor on that cell. And these receptors can bind onto either infected cells that have been infected with some type of viral agent or they can abide onto cancer cells and destroy those cancer cells.