What does the air cell pocket do for the chicken egg?

The air cell pocket in a chicken egg serves as a reservoir of air that provides the developing embryo with oxygen as it grows. It forms as moisture and air seep through the porous shell during incubation, creating a space at the larger end of the egg. This pocket also helps regulate temperature and humidity, which are crucial for proper development. As the embryo develops and consumes the yolk, it relies on the air cell for respiration before hatching.