The upper respiratory tract (URT)consists of the nose,nasal cavity,pharynx,and paranasal sinuses.It undergoes a process sometimes referred to as

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The process undergone by the upper respiratory tract is referred to as air conditioning, which involves warming, humidifying, and filtering the inhaled air to prepare it for transfer to the lower respiratory tract.

The Upper Respiratory Tract (URT)consists of the Nose,nasal Cavity,pharynx,and Paranasal