+A cough is a sudden, often repetitive expulsion of air from the lungs through the glottis. This reflex action clears the [Respiratory tract](/wiki/Respiratory_tract) of irritants, but a persistent cough may indicate an underlying [Illness](/wiki/Illness).
+## See also
+- [Lung](/wiki/Lung)
+- [Airway](/wiki/Airway)
+- [Throat](/wiki/Throat)
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