Page 171 - Allah's Gentle Artistry

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The chick absorbs oxygen and releases carbon dioxide
through a layer filled with capillaries on the inner surface of
the shell membrane. It does not use its lungs to breathe as adult
birds do, but exchanges air through small pores in the shell.
But that eggshell nevertheless needs to be strong enough

to ensure the proper functioning of gasses, water and heat
within it. It needs to be resistant enough to protect the embryo
from external trauma and from the weight of the mother as she
sits on the nest. But the egg does all these things perfectly.
Allah, Who holds everything in heaven and Earth in His con-
trol, gives us such examples to make us aware of His flawless
creation.