Structure of an egg

A fully  formed egg has a shell, two membranes, albumen, yolk, germinal.
Albumin is the white part of the egg, yolk is the yellow part of the egg, germinal disk is present in side of the yolk.
The shell of the egg is made of Calcium carbonate, it forms the protective covering of the inner contents of the egg,  an egg shell is a brutal and easily breaks. It is porous and contains thousands of small holes near about 7000-17000 per egg, which allow gases to pass in and out of the egg for developing the embryo(in the case of fertilized.
The small holes are covered with a thin layer , of a gelatinous material (mucoprotein) called the cuticle or the bloom , the cuticle is soluble in water and easily removed by washing, which result deterioration of the egg.
Egg show great variety in the surface characteristic of their shell. Some are glossy, dull, smooth and rough.

Inside the shell, there are inner and an outer membrane that also protect the quality of the egg. Both the membranes are porous and composed of fibers. The outer membrane is 48µm, which has six layers of fibers and the inner membrane is 22µm which has three fibers membrane. This membrane are composed of protein-polysaccharide.

The white or the albumin of the egg consist of three layers, two areas of thin white encompassing one area of thick white. The yolk is enclosed in a sac called vitelline membrane.

Immediately beyond this is another membrane layer known as the chalaziferous layer. The yolk is connected to thick o firm albumin by two twisted rope of the chalaziferous  layer called chalazae strive to anchor the yolk in the white and keep it centred in the egg.

The germ spot externals a white column called the latebra. The yolk itself is layered into section of white or yellow yolk.