BIOL 1030 Study Guide - Midterm Guide: Opossum, Yolk Sac, Diapsid

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 1030
• Professor: Kevin G.Scott

Document Summary

34. 5 amniotes are tetrapods that have terrestrially adapted egg. Their name is due to a character the amniotic egg which has for specialized membranes the ammnion, the chorion, yolk sac and the allantois. These layers are called extraembryonic membranes because it"s not a part of the embryo itself. Amnion surrounds embryo and acts as hydraulic shock absorber the other membranes functioning gas exchange and the transfer of nutrients and waste. This type of egg allowed amphibians to depends less on the aquatic environment. Amniotes use their rib cage to ventilate their lungs. Reptiles have skills that contain keratin which helps helps them protect skin. Fertilization it occurs internally before the egg is secreted and they mostly lay their eggs on land. They"re called cold blooded because they don"t rely on their metabolism control their body temperature they adapt their body temperature by behavioral adaptations.