9. What is the chorioallantoismembrane present in theembryonic development ofreptiles and birds? How doesthis membrane participate inthe energetic metabolism ofthe embryo?

9. 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?

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!