What are other organs and tissues made from that germ layer?
What is gastrulation? How during gastrulation are the &rst two germ layers formed? Which are these germ layers?
Which hormones are produced by placenta?
What is yolk sac?
How during gastrulation are the first two germ layers formed?
How is the neural tube formed?
Explain notochord?
What are the blastopore?
What is gastrulation? How during gastrulation are the first two germ layers formed?
After the morula stage what is the next stage?
What are extra embryonic membranes? Name these layers in vertebrates?
What is coelom? Are all animals coelomate?
Name the three types of germ layers that form tissues and organs in animals?
What are the archenteron and the blastopore? What is the stage of the embryonic development in which these structures are formed?
What are the functions of umbilical cord?