What are the archenteron and the blastopore? What are the destinations of the archenteron and of the blastopore?1
What is gastrulation? How during gastrulation are the &rst two germ layers formed? Which are these germ layers?1
Explain the difference between amnion and chorion?
How is the yolk sac formed? What is the function of the yolk sac?
What are the functions of placenta?
What is coelom? To which structures do coeloms give birth?
Are all animals coelomate?
Explain coeloms. From which germ layer does it originate?
What are the cells produced in the first stage of the embryonic development called?
Nmae extra embryonic membranes layers in vertebrates?
What is the main function of placenta?
After the neurula stage and from its ventral portion to the dorsal how can the morphology of the embryo be described?
What is umbilical cord? And what are its functions?
Why can the amnion also be considered an adaptation to terrestrial life?
What is polyembryony?
What is coelom? To which structures do coeloms give birth? Are all animals coelomate?