When are archenteron and blastopore formed?
What are pericardium?
How is the mesoderm (third germ layer) of triploblastic animals formed?
What is the function of the yolk sac?
Explain vegetal pole?
What are histogenesis and organogenesis?
What are the cells produced in the first stage of the embryonic development called?
What is placenta? What are its functions?
How is the yolk sac formed? What is the function of the yolk sac?
Explain the morphology of an embryo from ventral to dorsal portion after neural stage?
What is umbilical cord?
What is the function of the umbilical cord?
What is notochord? How is this structure formed?
What organogenesis?
What is coelom? To which structures do coeloms give birth?