The primordial germ cells in early mouse embryos: Light and electron microscopic studies

摘要: Abstract The migrating primordial germ cells in mouse embryos aged between 8.5 and 11 days were identified under the light electron microscopes by means of localizing alkaline phosphatase activity, their ultrastructure was studied. Most round with smooth contour; they invariably close contact irregularly shaped surrounding cells. ultrastructural characteristics early included: prominent nucleoli, cytoplasmic protrusions into nuclei, Golgi complexes disappearance granular endoplasmic reticulum increasing age embryos, dense cytoplasm extremely abundant ribosomes, granules. significance these findings is discussed relation to origin migration