| A | B |
|---|
| Shell | The hard protective covering of the egg. |
| Outer shell membrane | The hard shell is connected to this thin layer. |
| Inner shell membrane | The thin layer around the watery part of the egg. |
| Air Cell | Increases in size with age; where the embryo takes its first breath. |
| Albumen | Also called the "white" of the egg; the main source of protein and water for the embryo. |
| Chalazae | Tightly wrapped membranes; keeps the yolk centered in the egg. |
| Yolk | The main food source for the growing embryo. |
| Blastodisc | The white spot on the surface of every yolk that contains only female cells. |
