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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
What is gastrulation? 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?
What is the chorioallantois membrane present in the embryonic development of reptiles and birds?
What are the endocrine functions of the placenta?
After the neurula stage and from its ventral portion to the dorsal how can the morphology of the embryo be described?
Explain animal pole?
What is yolk sac?
What are the archenteron and the blastopore?
What are histogenesis and organogenesis?
What is the function of the umbilical cord?
How is the yolk sac formed? What is the function of the yolk sac?
What is yolk sac? How is it formed?
Explain archenteron?
To which structures do coeloms give birth?
Explain foetal pole?
