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
What is gastrulation?
What is the function of the vitellus in the vertebrate egg? How are these eggs classified according to the amount of vitellus within them?
After the morula stage what is the next stage?
Nmae extra embryonic membranes layers in vertebrates?
What is gastrulation? How during gastrulation are the &rst two germ layers formed? Which are these germ layers?
Explain histogenesis?
From which germ layer do blood cells originate? What are other organs and tissues made from that germ layer?
Explain coeloms. From which germ layer does it originate?
What is the significance of placenta?
Explain monozygotic and dizygotic twins?
What is umbilical cord? And what are its functions?
Are all animals coelomate?
To which structures do coeloms give birth?
What are pericardium?
Genetically what are the two types of twins that can be generated?