![]() ![]() Megakaryoblast is a large basophilic cell that contains a U-shaped or ovoid nucleus with prominent nucleoli. Thrombopoiesis, or the formation of platelets, occurs in the red bone marrow. Outside the blood vessel wall, they are transformed into macrophages of the mononuclear phagocyte system. Monocytes are transported in the blood but are also found in connective tissues, body cavities and organs. Monocytes spend only a short period of time in the marrow before being released into the bloodstream. Promonocytes differentiate from bone marrow stem cells (monoblasts) and multiply to give rise to monocytes. Stem cells for T cells come from bone marrow, develop in the thymus and, subsequently, seed the secondary lym phoid organs. ![]() ![]() Cells develop in bone marrow and seed the secondary lymphoid organs (e. Lymphocytes develop from bone marrow stem cells (lymphoblasts). It has a nucleus shaped like a curved rod or band.īands normally constitute 0,5–2 % of peripheral WBCs they subsequently mature into definitive neutrophils.Īgranulopoiesis is the process of lymphocyte and mono-cyte for mation. Anatomical dead space series#This is the first cell of this series to appear in the peripheral blood. Neutrophilic granulocytes exhibit an intermediate stage called the band neutrophil. Granulocytes are the definitive cells that enter the blood. The cytoplasm contains azurophilic granules and increasing numbers of specific granules. Metamyelocyte is a cell whose indented nucleus exhibits lobe formation that is characteristic of the neutrophil, eos-inophil, or basophil. Specific granules arise from the Golgi apparatus, resulting in neutrophilic, eosinophilic, and basophilic myelocytes. The nucleus becomes increasingly heterochromatic with subsequent divisions. Myelocyte is the last cell in this series capable of division. The cytoplasm is basophilic and contains peripheral azurophi-lic granules. Promyelocyte is a cell that contains a large spherical indented nucleus with coarse condensed chromatin. Myeloblasts divide differentiate to form smaller promyelocytes. It has a basophilic cytoplasm and no granules. Myeloblast is a cell that has a large spherical nucleus containing delicate euchromatin and several nucleoli. Bone marrow stem cells differentiate into all three types of granulocytes. Granulopoiesis is the process of granulocyte formation. ![]()
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