Page 99 - Miracles in Our Bodies

epiglottis

glottis
esophagus
windpipe

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I In the air we inhale, there are many microbes and harmful substances. We are

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p protected against many of these thanks to the hairs lining the respiratory
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t tract. They cannot harm us thanks to this system that Allah created for us.
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Mucous, which forms this layer, grasps tiny particles
like dust that we've taken in together with the air and
hinders them from entering the lungs. Yet, in addition to
this, the accumulated foreign matter must also be elimi-
nated from the body. At this point, another security mech-
anism comes into play. This mechanism consists of tiny
hair-like structures called cilia, which lie under the mu-
cous layer. These tiny hairs rhythmically beat upwards
towards the mouth. This can be compared to ears of
wheat waving in the wind all in the same direction.
Thanks to this movement of the cilia, mucous, which
holds the foreign matter, is carried upwards in the wind-
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