Nasal Cavity

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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 2013 presented a 45-year-old male with a large mass in the left side of nasal cavity that caused the destruction of the nasal septum and sphenoid wing, erosion of sphenoid and ethmoid sinus, involvement of cavernous sinus and expansion of medial wall of both orbits.
Endoscopic examination results revealed a big, yellow, lobular polypoid lesion in the right nasal cavity and multiple polypoid masses in the left nasal cavity.
The dog was presented for evaluation of a mass on the nasal cavity which the owner had noticed 2 months ago.
Clinical examination revealed greyish white irregular stony hard mass on the floor of left nasal cavity between inferior turbinate and septum.
The detailed morphology of nasal cavity comprising of dorsal nasal turbinate, ventral nasal turbinate, middle nasal turbinate and ethmo-turbinate bones and boundaries were recorded.
The definition of nasal cavity is described by four boundaries [Figure 1].
After the inferior turbinate was shifted by fracture, to prevent nasal cavity adhesion and nasal obstruction after treatment, the fracture was repositioned and absorbable cotton was placed over the eroded mucous membrane.
The company's lead product, the RhinoChill IntraNasal Cooling System is designed to deliver targeted, effective and therapeutically beneficial cooling to the nasal cavity and the brain (and to the body via the cooled brain, if so desired).
Occasionally it can be found in areas outside the major salivary glands involving the minor salivary glands located in hard and soft palate, lips, floor of the mouth, tongue, retromolar area, peritonsillar region, lacrimal tract and the nasal cavity.
4 On the contrary, in Asian patients the nasal cavity is more common as a primary site than the maxillary sinus.
At the beginning of the examination, the patient was asked to interrupt his or her respiration so that the sound waves penetrated the nasal cavity and allowed the calibration that would generate the graph.