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 notochord? How is this structure formed?
Explain monozygotic and dizygotic twins?
Explain foetal pole?
Nmae extra embryonic membranes layers in vertebrates?
What are the destinations of the archenteron and of the blastopore?
Is there exchange of cells between the mother and the fetus through the placenta?
What are the main substances transferred from the mother to the fetus through the placenta and from the fetus to the mother?
What are pericardium?
What is the cell division during the first stage of the embryonic development called?
What is notochord?
Which is the extra embryonic membrane whose function is to store nitrogen wastes of the embryo?
What are histogenesis?
What is gastrulation? How during gastrulation are the &rst two germ layers formed? Which are these germ layers?
What is the embryonic origin of the nervous system in vertebrates?
Are the extra embryonic membranes the same in all vertebrates?
