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 the morphology of an embryo from ventral to dorsal portion after neural stage?
From which germ layer do the epidermis and the nervous system originate? What are other organs and tissues made from that germ layer?
What is the significance of placenta?
When are archenteron and blastopore formed?
Explain blastopore?
What is the morphological feature that defines that stage?
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 are the extra embryonic membranes present in vertebrates?
Explain organogenesis?
How notochord structure id formed?
Explain vegetal pole?
What are the functions of placenta?
After the blastula stage what is the following stage of the embryonic development? How is the passage from blastula to the next stage called?
From which germ layer does coeloms originate?
Which cells are produced in the first stage of embryonic development?