What protects a chicken embryo?

- The main protective structure surrounding the chicken embryo is the eggshell.

- It is a hard and calcified shell composed primarily of calcium carbonate.

- The eggshell provides a strong and rigid barrier against external impacts, vibrations, and mechanical stress, shielding the developing embryo inside.

2) Chorionic Membranes:

- Beneath the eggshell lies a series of protective membranes known as chorionic membranes.

- These membranes line the inside of the shell and envelop the developing embryo.

- The outermost layer of the chorionic membranes is the chorioallantoic membrane, which facilitates gas exchange and nutrient transport.

- The inner layer is the amnion, which encloses the embryo in a fluid-filled cavity called the amniotic sac. This sac cushions and protects the embryo, preventing dehydration and mechanical damage.

3) Albumen (Egg White):

- The albumen or egg white is a thick, viscous liquid surrounding the yolk.

- It contains various proteins, including ovomucin, which contributes to the elasticity and protective qualities of the albumen.

- The albumen provides nutrients, helps maintain water balance, and acts as a physical barrier against external contaminants.

4) Yolk:

- The yolk, rich in nutrients, is contained within the albumen.

- It serves as a crucial source of energy and building blocks for the developing embryo.

- The yolk is surrounded by the vitelline membrane, which helps maintain its integrity and protects it from external influences.

5) Air Cell:

- At the blunt end of the egg, there is an air cell or air pocket.

- This air cell provides a vital oxygen supply for the developing embryo during the later stages of incubation.