Nasal Cavity

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Related to Nasal cavities: pharynx, trachea

nasal cavity

[′nā·zəl ¦kav·əd·ē]
Either of a pair of cavities separated by a septum and located between the nasopharynx and anterior nares.

Nasal Cavity


the cavity in which the olfactory organs of vertebrate animals are located. In terrestrial vertebrates and in man, the nasal cavity is also the initial division of the respiratory tract.

The nasal cavity is unpaired in cyclostomes and paired in fish. In all pulmonate organisms, the paired nasal cavity opens to the outside through external nasal orifices. The nasal and oral cavities are connected by means of choanae in lungfishes, amphibians, the majority of reptiles, and birds. In animals with a hard palate—crocodiles, mammals, and man—the nasal cavity is connected with the nasopharynx; in this case, the posterior section of the nasal cavity extends into the nasopharyngeal canal. In amniotes and man, the anterior section of the nasal cavity is called the vestibule.

In all terrestrial vertebrates the nasal cavity is divided by the maxilloturbinal bone into two sections: the superior nasal meatus and the inferior nasal meatus. In birds and the majority of mammals the superior nasal meatus contains the concha nasalis, or the turbinate bone. In mammals and man the posterior section of the nasal cavity contains the conchae of the ethmoid bone, which are covered by olfactory epithelium. All terrestrial vertebrates have a nasolacrimal canal that connects the eye socket with the nasal cavity; in most of these animals, Jacobson’s organ is formed by an outgrowth of the nasal cavity. In crocodiles, birds, and especially mammals and man, the nasal cavity is connected with the air cavities in the cranial bones.


References in periodicals archive ?
In humans, formaldehyde has been associated with nasopharyngeal cancers, and with squamous-cell carcinoma of the nasal cavities and paranasal sinuses (20,42,45-49).
R) nasal cavity packed with 4% xylocaine with adrenaline with 00 nasal endoscope both nasal cavities are examined, no foreign body seen in either of nasal cavity or nasopharynx, after repeated attempts foreign body could not be seen, than the senior faculty member did DNE (Diagnostic Nasal Endoscopy) after careful examination we could see a purulent thick mucoid plug seen at the anterior end of inferior turbinate, with powerful suction the mucus plug was cleared than we could see a metallic stained foreign body (open safety pin) embedded in inferior meatus, with help of skin hook, the anterior end of foreign body engaged and slowly pulled out.
Yet the technique used, which employed a genetically engineered virus that forced sensory cells in rat nasal cavities to overproduce the receptor, is too labor-intensive to apply to all 1,000 or so receptors.
The nasal mucosa was hyperemic, and serous secretions were seen in both nasal cavities.
To understand how to fight colds more effectively, the Virginia scientists used computed tomography (CT) to look deep into the nasal cavities of 31 young adults who had just developed cold symptoms.
The differential diagnosis of a longstanding nasal foreign body should include unilateral sinusitis, unilateral nasal calcified polyp, osteoma, osteomyelitis, fungal infection, (4) syphilis, (1) and benign and malignant tumors of the nasal cavities.
During an office visit for evaluation of the eat" disease, a complete examination of the nasal cavities and nasopharynx was also performed.
We theorized that the functional and histologic disturbances in the noses of laryngectomy patients--particularly nasal disuse--might alter the dimensions of their nasal cavities.
The mass had displaced the septum and obstructed both nasal cavities.
On anterior rhinoscopy, no obstruction was seen in the anterior nasal cavities, including the middle meatus bilaterally.
Complete surgical closure of the nasal cavities for the treatment of atrophic rhinitis was first described by Young in 1967.