What is the function of the vitellus in the vertebrate egg?
What is the function of the vitellus in the vertebrate egg? How are these eggs classified according to the amount of vitellus within them?
What are the blastopore?
What is notochord? How is this structure formed?
What stage follows gastrulation?
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?
Which is the extra embryonic membrane whose function is to store nitrogen wastes of the embryo? Is this function present in placental mammalian embryos?
What are peritoneum?
What are histogenesis?
What is yolk sac?
What is gastrulation? How during gastrulation are the &rst two germ layers formed? Which are these germ layers?
Which is the extra embryonic membrane whose function is to store nitrogen wastes of the embryo?
What are somites?
How does the embryo turn from gastrula into neurula?
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?