a: Respiratory system ~
b: sponge
What:
"You stayed for few hours in the bar last night or you occasionally spray air fresheners at home. We also regularly inhale dust that is swirling unnoticed around us. All these impurities are breathed in through our nose and mouth, and because our respiratory system is like a sponge, it absorbs all the impurities."
Useful?
Writer: Not Stated
LCC:
Where: Reference Link Has Evaporated
Date: Jan 23 2015 10:56 AM
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