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This Concept Map, created with IHMC CmapTools, has information related to: Embryonic Development, radial in deuterostomes, extraembryonic membrane development then Organogenesis, spiral in protostomes, secondary oocyte and then fusion of nuceli and DNA replication, chorion becomes the placenta, penetration and formation of fertilization membrande, completion of meiosis II by the secondary oocyte, Organogenesis which forms organs, archenteron surrounded by endoderm, blastula then gastrula, blastula a hollow sphere of cells, gastrula which has 3 germ layers, Embryonic Development begins with fertilization, organs from the germ layers, extraembryonic membrane development such as chorion, cleavage followed byt morula, recognition the sperm binds to the zona pellucida, extraembryonic membrane development such as allantois, cleavage can be radial, formation of fertilization membrande then the completion of meiosis II