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What are the archenteron and the blastopore? What is the stage of the embryonic development in which these structures are formed? What are the destinations of the archenteron and of the blastopore?
5After the neurula stage and from its ventral portion to the dorsal how can the morphology of the embryo be described?
5What is gastrulation? How during gastrulation are the first two germ layers formed? Which are these germ layers?
5Which is the extra embryonic membrane whose function is to store nitrogen wastes of the embryo? Is this function present in placental mammalian embryos?
5What is the chorioallantois membrane present in the embryonic development of reptiles and birds? How does this membrane participate in the energetic metabolism of the embryo?
5How does the embryo turn from gastrula into neurula? How is the neural tube formed? What is the embryonic origin of the nervous system in vertebrates?
5
After the morula stage what is the next stage?
How is the mesoderm (third germ layer) of triploblastic animals formed?
What are the archenteron?
What organogenesis?
Which is the extra embryonic membrane whose function is to store nitrogen wastes of the embryo?
What is gastrulation? How during gastrulation are the &rst two germ layers formed? Which are these germ layers?
From which germ layer do blood cells originate? What are other organs and tissues made from that germ layer?
What is gastrulation?
After the neurula stage and from its ventral portion to the dorsal how can the morphology of the embryo be described?
What are the extra embryonic membranes present in vertebrates?
What is coelom? To which structures do coeloms give birth?
What is the cell division process directly related to the embryonic growth?
How does the embryo turn from gastrula into neurula?
What are the functions of umbilical cord?
What are extra embryonic membranes?
