In the illustration, the parts of amniotic egg are shown with the following texts:

• Amnion: The amnion is a fluid-filled sac that surrounds and cushions the developing embryo. It produces a protected, watery environment.
• Chorion: The chorion regulates the transport of oxygen from the surface of the egg to the embryo and the transport of carbon dioxide, one product of respiration, in the opposite direction.
• Yolk Sac: This baglike structure contains a yolk that serves as a nutrient-rich food supply for the embryo.
• Embryo
• Shell
• Allantois: The allantois stores the waste produced by the embryo. It later fuses with the chorion and serves as a respiratory organ.