Eosinophil

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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 [1].

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 [2]. 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.

References

  1. http://en.wikipedia.org/wiki/Eosinophil_granulocyte
  2. Alberts et al, Molceular Biology of the Cell (4th), 2002
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