Description: Scheme electron microscopy.
The promegakaryocyte (20-80 mm) develops from a basophilic megakaryoblast (up to 50 mm) that originates from a committed stem cell. The large promegakaryocyte starts with the early synthesis of the characteristic granules of platelets. Apart from a bilobed nucleus (1) and few nucleoli, a well developed Golgi area (2), some rough endoplasmic profiles (3) and polysomes are present. This cell contains already electron-dense granules (4).
Keywords/Mesh: blood, bone marrow, promegakaryocyte, megakaryocyte, histology, electron microscopy, POJA collection