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
Are all animals coelomate?
How during gastrulation are the first two germ layers formed?
What is the stage of the embryonic development in which these structures are formed? What are the destinations of the archenteron and of the blastopore?
How notochord structure id formed?
What are pleura, pericardium, and peritoneum?
What is the cell division during the first stage of the embryonic development called? How is this stage characterized?
What are extra embryonic membranes?
What are the four initial stages of the embryonic development?
What are the three types of germ layers that form tissues and organs in animals?
What is umbilical cord? And what are its functions?
How is the yolk sac formed? What is the function of the yolk sac?
What are the endocrine functions of the placenta?
From which germ layer do blood cells originate?
What are pleura?
What is notochord?