** Transition from diffusive respiration through the [[Exotics_-_Composition_of_the_Egg_-_Anatomy_%26_Physiology#Embryonic_Membranes|chorioallantois]] to breathing through the [[Lungs_-_Anatomy_%26_Physiology|lungs]]. | ** Transition from diffusive respiration through the [[Exotics_-_Composition_of_the_Egg_-_Anatomy_%26_Physiology#Embryonic_Membranes|chorioallantois]] to breathing through the [[Lungs_-_Anatomy_%26_Physiology|lungs]]. |