Eosinophils stain with acidophilic dyes including eosin red. They have a bilobed nucleus, are weakly phagocytic, and are involved in the immune defense against worms. Eosinophils are released into the peripheral blood in a phenotypically mature state, and are capable of undergoing activation and recruitment into tissues in response to appropriate stimuli, most notably cytokines interleukin-5 and the eotaxins. Eosinophils spend only a brief time in the peripheral blood (half-life of about 18 hours) before they migrate to the thymus or gastrointestinal tract, where they reside under homeostatic conditions. In response to inflammatory stimuli, eosinophils develop from committed bone marrow progenitors, after which they exit, migrate into the blood and subsequently accumulate in peripheral tissues where survival is prolonged.

http://purl.obolibrary.org/obo/HP_0001879

Eosinophils stain with acidophilic dyes including eosin red. They have a bilobed nucleus, are weakly phagocytic, and are involved in the immune defense against worms. Eosinophils are released into the peripheral blood in a phenotypically mature state, and are capable of undergoing activation and recruitment into tissues in response to appropriate stimuli, most notably cytokines interleukin-5 and the eotaxins. Eosinophils spend only a brief time in the peripheral blood (half-life of about 18 hours) before they migrate to the thymus or gastrointestinal tract, where they reside under homeostatic conditions. In response to inflammatory stimuli, eosinophils develop from committed bone marrow progenitors, after which they exit, migrate into the blood and subsequently accumulate in peripheral tissues where survival is prolonged.

Abnormal eosinophil morphology

HP:0001879

Abnormal eosinophil morphology

http://purl.obolibrary.org/obo/HP_0001911