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
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?
What is the function of the yolk sac?
What are the archenteron?
What stage follows gastrulation?
What is gastrulation?
Explain archenteron?
What is notochord?
What is yolk sac?
What is yolk sac? How is it formed?
Explain coeloms.
Explain the difference between amnion and chorion?
How during gastrulation are the first two germ layers formed?
Explain foetal pole?
What are other organs and tissues made from that germ layer?
What are the cells produced in the first stage of the embryonic development called?