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 stage follows gastrulation?
What is the function of the umbilical cord?
Which is the extra embryonic membrane whose function is to store nitrogen wastes of the embryo?
Explain notochord?
What is placenta?
Are all animals coelomate?
Explain histogenesis?
Is there exchange of cells between the mother and the fetus through the placenta?
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?
In which type of animals does the placenta exist? What is its main function?
What is coelom? Are all animals coelomate?
Which cells are produced in the first stage of embryonic development?
Nmae extra embryonic membranes layers in vertebrates?
From which germ layer do the liver and the pancreas originate? What are other organs and tissues made from that germ layer?
How notochord structure id formed?