Granulocyte

<p>Granulocytes are cells in the <a href="/facts/Innate_immune_system/lz4BpSQI">innate immune system</a> characterized by the presence of <a href="/facts/Specific_granule/tlxryfTj">specific granules</a> in their <a href="/facts/Cytoplasm/Wa0sE6xf">cytoplasm</a>. Such granules distinguish them from the various <a href="/facts/Agranulocyte/UNsRkKKK">agranulocytes</a>. All <a href="/facts/Myeloblast/g32XTIXd">myeloblastic</a> granulocytes are polymorphonuclear, that is, they have varying shapes (morphology) of the <a href="/facts/Cell_nucleus/D7sFRa3c">nucleus</a> (segmented, irregular; often lobed into three segments); and are referred to as polymorphonuclear leukocytes (PMN, PML, or PMNL). In common terms, <i>polymorphonuclear granulocyte</i> refers specifically to "<a href="/facts/Neutrophil/KL6oTt8b">neutrophil</a> granulocytes", the most abundant of the granulocytes; the other types (<a href="/facts/Eosinophil/yhIKA8bE">eosinophils</a>, <a href="/facts/Basophil/FRN1ugHk">basophils</a>, and <a href="/facts/Mast_cell/szfXss5q">mast cells</a>) have varying morphology. Granulocytes are produced via <a href="/facts/Granulopoiesis/RRk7AnGa">granulopoiesis</a> in the <a href="/facts/Bone_marrow/4dfudk0H">bone marrow</a>.
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Granulocyte open-in-new

Granulocyte