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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
What are the main substances transferred from the mother to the fetus through the placenta and from the fetus to the mother?
Explain the difference between amnion and chorion?
What are the cells produced in the first stage of the embryonic development called?
Explain the embryonic development stages after formation of blastula?
How is the yolk sac formed? What is the function of the yolk sac?
How notochord structure id formed?
What is gastrulation?
What is gastrulation? How during gastrulation are the first two germ layers formed? Which are these germ layers?
What is the cell division during the first stage of the embryonic development called? How is this stage characterized?
From which germ layer do the epidermis and the nervous system originate?
What stage follows gastrulation?
What is the function of the vitellus in the vertebrate egg?
Nmae extra embryonic membranes layers in vertebrates?
How does the embryo turn from gastrula into neurula? How is the neural tube formed?
What are the functions of umbilical cord?
