And what that basically means is it doesn't matter what type of antigen is found in close proximity these mass cells will bind any antigen and once they bind that antigen they know that there is some type of pathogen in close proximity. And so what they begin to do is they remain within the tissue and they begin releasing chemicals. So what types of chemicals? Well they release histamines and histamines when they move into our blood they dilate the blood vessel and that increases the flow of blood to this infected area. And that in turn as we'll see in just a moment brings more of the white blood cells that basically help protect this area. Now the other chemical that they release is heparin and heparin is basically an anticoagulant.