Why should we breathe through the nose and not the mouth?



The air we breathe is first processed through the nose. The nose is a miraculous filter lined with tiny hairs called cilia. The cilia have many functions: they filter, humidify and warm or cool the air (depending on the temperature) before it enters the lungs. It is estimated that cilia protect our bodies against about 20 billion particles of foreign matter every day!



Once it exits the nose, air passes through the mucus-lined windpipe. This is another avenue to trap unwanted particles before they enter the lungs. Next, air enters the lungs, where the oxygen is pumped into the bloodstream and circulated through the body. In exchange, the air leaving the body carries with it carbon dioxide from the cells, a waste material that is expelled through exhalation.



We breathe through our nose because the nostrils are smaller than the mouth, air exhaled through the nose creates a back flow of air (and oxygen) into the lungs. And because we exhale more slowly through the nose than we do though the mouth, the lungs have more time to extract oxygen from the air we’ve already taken in.



 



Picture Credit : Google


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