The nasal cavity warms and moistens the air and filters it of impurities. The sinuses are hollow areas, or cavities, in the bones of the skull that are lined with mucous membranes and that open into the nasal cavity. The sinuses provide resonance for the voice. When the sinuses are inflammed and filled with mucus the voice has a different quality, The pharynx refers to the part of the respiratory tract behind the nasal cavity and mouth. Mounted on Board with Keycard. |
