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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 endocrine functions of the placenta?
What are pleura, pericardium, and peritoneum?
Explain peritoneum?
How is the mesoderm of triploblastic animals formed?
Is there exchange of cells between the mother and the fetus through the placenta?
Explain the morphology of an embryo from ventral to dorsal portion after neural stage?
What is the embryonic origin of the nervous system in vertebrates?
How does the embryo turn from gastrula into neurula?
What is the function of the vitellus in the vertebrate egg? How are these eggs classified according to the amount of vitellus within them?
What is coelom?
What are the three types of germ layers that form tissues and organs in animals?
What is gastrulation? How during gastrulation are the &rst two germ layers formed? Which are these germ layers?
Explain vegetal pole?
Which hormones are produced by placenta? What is their significance?
What is polyembryony?
