The<unk>  is a bone marrow cell responsible for the production of blood platelets necessary for normal blood clotting.<unk> s normally account for 1 out of 10,000 bone marrow cells but can increase in number nearly 10-fold in certain diseases. In general,<unk> s are 10 to 15 times larger than a typical red blood cell, averaging 50-100 μm in diameter. During its maturation, the<unk>  grows in size and replicates its DNA without cytokinesis.  As a result, the nucleus of the<unk>  can become very large and lobulated, which, under a light microscope, can give the false impression that there are several nuclei.  In some cases, the nucleus may contain up to 64N DNA, or 32 copies of the normal complement of DNA in a human cell.
Megakaryocyte
Megakaryoblast
Monocyte
Histiocyte
Granulocyte
Proerythroblast
Oocyte
Lymphoblast