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?
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What is the difference between amnion and chorion?
What is umbilical cord? And what are its functions?
What are the extra embryonic membranes present in vertebrates?
Why can the allantois be considered an adaptation to terrestrial life?
What are the four initial stages of the embryonic development?
Explain blastopore?
What are the archenteron and the blastopore? What is the stage of the embryonic development in which these structures are formed?
What is yolk sac?
Explain foetal pole?
What is the significance of placenta?
Explain peritoneum?
Explain pleura?
Define polyembryony?
After the morula stage what is the next stage? What is the morphological feature that defines that stage?
How during gastrulation are the first two germ layers formed?