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A human nose

A nose is a protuberance in vertebrates that houses the nostrils, or nares, which admit and expel air for respiration. In most mammals, it also houses the nosehairs, which catch airborne particles and prevent them from reaching the lungs. Within and behind the nose is the olfactory mucosa and the sinuses. Behind the nasal cavity, air next passes through the pharynx, shared with the digestive system, and then into the rest of the respiratory system. In humans, the nose is located centrally on the face; on most other mammals, it is on the upper tip of the snout. Nose as a term may be used to designate the leading end of anything, such as an airplane.
Human nose in profile
Human nose in profile
 

All text is available under the terms of the GNU Free Documentation License (see Copyrights for details).

 

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Submitted By:Shruti
Date: 8/23/2012
Nice site to check details



 
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