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What are the four initial stages of the embryonic development? |
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From which germ layer do the epidermis and the nervous system originate? What are other organs and tissues made from that germ layer? |
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How 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? |
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What 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? |
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What is the function of the umbilical cord? |
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What are extra embryonic membranes? |
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After the morula stage what is the next stage? What is the morphological feature that defines that stage? |
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What is the function of the vitellus in the vertebrate egg? How are these eggs classified according to the amount of vitellus within them? |
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What are the extra embryonic membranes present in vertebrates? |
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How is the mesoderm (third germ layer) of triploblastic animals formed? |
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What are the endocrine functions of the placenta? |
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What are the cells produced in the first stage of the embryonic development called? |
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What are pleura, pericardium, and peritoneum? |
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Which is the extra embryonic membrane whose function is to store nitrogen wastes of the embryo? Is this function present in placental mammalian embryos? |
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After the neurula stage and from its ventral portion to the dorsal how can the morphology of the embryo be described? |
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What is notochord? How is this structure formed? |
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What are histogenesis and organogenesis? |
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Which illustrates a variable ratio schedule of reinforcement? |
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What are somites? |
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What are the main substances transferred from the mother to the fetus through the placenta and from the fetus to the mother? |
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