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After the blastula stage what is the following stage of the embryonic development? How is the passage from blastula to the next stage called?
5What is the function of the vitellus in the vertebrate egg? How are these eggs classified according to the amount of vitellus within them?
5What are the main substances transferred from the mother to the fetus through the placenta and from the fetus to the mother?
5What is the cell division during the first stage of the embryonic development called? How is this stage characterized?
5After the morula stage what is the next stage? What is the morphological feature that defines that stage?
5
Explain vegetal pole?
From which germ layer do the epidermis and the nervous system originate? What are other organs and tissues made from that germ layer?
What are the destinations of the archenteron and of the blastopore?
What is the stage of the embryonic development in which these structures are formed?
What is the function of the yolk sac?
Explain gastrulation? What stage follows gastrulation?
What is coelom? To which structures do coeloms give birth?
To which structures do coeloms give birth? Are all animals coelomate?
How does the embryo turn from gastrula into neurula? How is the neural tube formed?
What is gastrulation? How during gastrulation are the &rst two germ layers formed? Which are these germ layers?
What is the function of the umbilical cord?
What is notochord?
How is the yolk sac formed?
After the morula stage what is the next stage?
What is umbilical cord? And what are its functions?
