What are extra embryonic membranes?

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How are animals classified according to the germ layers present in their embryonic development?

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What is the difference between amnion and chorion?

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What is coelom? To which structures do coeloms give birth? Are all animals coelomate?

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What are somites?

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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 gastrulation? How during gastrulation are the first two germ layers formed? Which are these germ layers?

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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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What are pleura, pericardium, and peritoneum?

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What are the three types of germ layers that form tissues and organs in animals?

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What is the function of the umbilical cord?

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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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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 are the four initial stages of the embryonic development?

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What is the cell division process directly related to the embryonic growth?

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