What is the cell division during the first stage of the embryonic development called? How is this stage characterized?

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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 are histogenesis and organogenesis?

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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?

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What is the germ layer from which the coeloms originate?

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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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