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What are the archenteron and the blastopore? What is the stage of the embryonic development in which these structures are formed?
1From which germ layer do the liver and the pancreas originate? What are other organs and tissues made from that germ layer?
1From which germ layer do blood cells originate? What are other organs and tissues made from that germ layer?
1
Explain archenteron?
Which is the extra embryonic membrane whose function is to store nitrogen wastes of the embryo?
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?
What is the morphological feature that defines that stage?
What are the three types of germ layers that form tissues and organs in animals?
What is the main function of placenta?
What is gastrulation? How during gastrulation are the &rst two germ layers formed? Which are these germ layers?
What are other organs and tissues made from that germ layer?
What is placenta?
To which structures do coeloms give birth?
From which germ layer do the epidermis and the nervous system originate? What are other organs and tissues made from that germ layer?
Genetically what are the two types of twins that can be generated?
What stage follows gastrulation?
Which hormones are produced by placenta? What is their significance?
From which germ layer do the liver and the pancreas originate? What are other organs and tissues made from that germ layer?
