We know an egg has two membranes,
but do you know WHY there is another “inner” membrane in an egg? …..

Soon after an egg is laid, a small air bubble forms in the large end under the shell.
A membrane separating the mass of the egg and the air bubble
serves as a diaphragm to relieve stress and pressure resulting from thermal changes of temperature.
but do you know WHY there is another “inner” membrane in an egg? …..
Soon after an egg is laid, a small air bubble forms in the large end under the shell.
A membrane separating the mass of the egg and the air bubble
serves as a diaphragm to relieve stress and pressure resulting from thermal changes of temperature.