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?
5After the neurula stage and from its ventral portion to the dorsal how can the morphology of the embryo be described?
5What is gastrulation? How during gastrulation are the first two germ layers formed? Which are these germ layers?
5Which is the extra embryonic membrane whose function is to store nitrogen wastes of the embryo? Is this function present in placental mammalian embryos?
5What 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?
5How 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?
5
What are the functions of placenta?
Explain peritoneum?
In which type of animals does the placenta exist? What is its main function?
How is the yolk sac formed?
Explain vegetal pole?
Explain coeloms.
What are pleura?
After the blastula stage what is the following stage of the embryonic development? How is the passage from blastula to the next stage called?
What is the significance of placenta?
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 are pleura, pericardium, and peritoneum?
What is yolk sac?
What is polyembryony?
Explain pericardium?
What are the endocrine functions of the placenta?
