From which germ layer do the epidermis and the nervous system originate? What are other organs and tissues made from that germ layer?
1What is the stage of the embryonic development in which these structures are formed? What are the destinations of the archenteron and of the blastopore?
1
Which cells are produced in the first stage of embryonic development?
What is the function of the yolk sac?
Name the three types of germ layers that form tissues and organs in animals?
What is the main function of placenta?
What is the chorioallantois membrane present in the embryonic development of reptiles and birds? How does this membrane participate in the energetic metabolism of the embryo?
Explain the morphology of an embryo from ventral to dorsal portion after neural stage?
What is yolk sac?
What is the cell division during the first stage of the embryonic development called? How is this stage characterized?
What are the functions of umbilical cord?
How yolk sac is formed?
What is the function of the umbilical cord?
Explain coeloms.
What are other organs and tissues made from that germ layer?
Which is the extra embryonic membrane whose function is to store nitrogen wastes of the embryo?
How is the mesoderm of triploblastic animals formed?
