what are the path ways of respiratory system
pharynx
-1
Section::::Abstract.
Respiratory tract
287885
epiglottis
-1
Section::::Abstract.
Respiratory tract
287885
mucous membrane
-1
Section::::Function.:Defences against infection.

Respiratory tract
287885
esophagus
-1
Section::::Abstract.
Respiratory tract
287885
larynx
-1
Section::::Abstract.
Respiratory tract
287885
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NONE
Section::::Abstract.
Respiratory tract
287885