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 the function of the vitellus in the vertebrate egg?
Explain the embryonic development stages after formation of blastula?
How is the mesoderm (third germ layer) of triploblastic animals formed?
What are the extra embryonic membranes present in vertebrates?
What is coelom? Are all animals coelomate?
What is yolk sac?
Explain vegetal pole?
What are histogenesis?
To which structures do coeloms give birth? Are all animals coelomate?
What are the functions of umbilical cord?
What is the function of the yolk sac?
What are the blastopore?
What is gastrulation? How during gastrulation are the first two germ layers formed?
Name the three types of germ layers that form tissues and organs in animals?
In which type of animals does the placenta exist? What is its main function?