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Nasal concha - Definition



Definition


The nasal conchae are three pairs of bony structures located in the nasal cavities, situated at the back of the nose. According to their position we may distinguish the superior nasal concha, the middle nasal concha, and the inferior nasal concha. The naval cavities circulate inhaled air from the nostrils, toward the pharynx, and through the trachea. The presence of a tissue layer serving as a filter for the nasal conchae prevents large air particles from penetrating the respiratory system by trapping them in mucus, a substance secreted in the nasal cavities. Furthermore, the nasal conchae are able to swell or contract, thus reducing or augmenting the intake of air as circumstances require.
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