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health advisory Hospital Health advisory 2007-11-16 5:20:04

Answer:

clears the throat of build up of liquids

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for the same reason we sneeze, what goes in must always go out!

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dirt and dust that we breathe into our trachea leading to our lungs must be cleared out, therefore being blown up by cilia hairs to the throat and coughed up then swalled down the gullet into the stomach

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cough is defentive mechanism in our body to expel any forgin body ,piece of food passes to our respiratory tract and any ,mucous plugs or sputum accumelation with infective microorgansms during upper respiratory tract infection to protrct our airway passage

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somthing to do with d cough center of the brain being stimulated

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