Parts of an Egg

air cell

The pocket of air in the wide part of the egg

germ spot

The "white spot" on a yolk. If the egg is fertilized and kept warm then the embryo will begin to develop from this spot.

USDA

The abbreviation for United States Department of Agriculture

shell

The hard protective covering of the egg. This has many tiny pores that allow air and moisture to pass in and out of the egg.

shell membranes

The thin layers inside the shell.

chalazae

The twisted strands (cords) of albumen at each end of the yolk. These anchor the yolk in the center of the shell.

albumen

The watery semi-solid white of an egg. It provides the developing embryo with food and water.

yolk

The yellow of an egg. This is the primary source of food for a growing embryo.