The egg yolk is rich in nutrients such as proteins, fats, vitamins, and minerals, which are essential for the growth and development of the embryo.

The shell gland, also known as the isthmus, is responsible for secreting the calcium carbonate that forms the eggshell.

The albumen is a thick, viscous fluid that surrounds the yolk and helps to protect the embryo from mechanical damage.

The chalazae are two thick, twisted strands of albumen that extend from the yolk to the shell and help to keep the yolk centered within the egg.

The air cell is a small pocket of air located at the blunt end of the egg and allows for expansion and contraction of the egg during temperature changes.

The germinal disc is a small, white spot on the surface of the yolk and is the site of fertilization.

Incubation is the process by which an egg develops into a chick and involves providing the egg with warmth and humidity.

The optimal temperature for incubating chicken eggs is 37°C (98.6°F), which is the same as the body temperature of a hen.

The incubation period for chicken eggs is typically 21 days.

Egg yolk is primarily composed of fats, including saturated and unsaturated fats.

Egg yolk is a rich source of vitamin D, which is important for bone health.

Cholesterol in eggs plays a vital role in brain development, hormone regulation, energy production, and cell membrane formation.

Egg white is a rich source of lysine, an essential amino acid that is important for protein synthesis and tissue repair.

The eggshell's primary function is to protect the egg from mechanical damage and prevent the entry of microorganisms.

The yellow color of the egg yolk is primarily due to the presence of carotenoids, including lutein and zeaxanthin.