This aids in the exchange of gases between the environment and the embryo. It functions in gas exchange and collects metabolic wastes from the embryo. It surrounds the embryo and the fluid it secretes cushions the embryo.
Reproduction is sexual with internal fertilization.
This condition enables an organism to survive on much less food than an endothermic organism. Reptilian Orders . Order Chelonia . They developed during the Mesozoic era. They show very little change from their ancestral form.