Eosinophils are a type of white blood cell. They fall under granulocytes, which are a category of white blood cells, along with neutrophils and basophils. They are heavily involved in the immunological response to parasites and some eukaryotic infections. They also play a significant role, along with mast cells, in the regulation of allergies and asthma .
Eosinophils come to existance by a process called haematopoiesis, which takes place within the bone marrow. However when fully mature they reside within the bloodstream . Once within the blood they are mainly found in the medulla, uterus, spleen and lymph nodes. If they are found in other internal organs, in a healthy individual, then this indicates disease.
- ↑ http://en.wikipedia.org/wiki/Eosinophil_granulocyte
- ↑ Alberts et al, Molceular Biology of the Cell (4th), 2002