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
What is the cell division process directly related to the embryonic growth?
Why can the allantois be considered an adaptation to terrestrial life?
What is gastrulation? How during gastrulation are the first two germ layers formed? Which are these germ layers?
How during gastrulation are the first two germ layers formed? Which are these germ layers?
Why can the amnion also be considered an adaptation to terrestrial life?
How is the neural tube formed? What is the embryonic origin of the nervous system in vertebrates?
What are the functions of placenta?
Where do liver and pancreas originate from?
How does the embryo turn from gastrula into neurula?
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?
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?
Explain pleura?
From which germ layer do the liver and the pancreas originate?
What is gastrulation? How during gastrulation are the &rst two germ layers formed? Which are these germ layers?
What is notochord?
