WordNet

soft decayed area in a tooth; progressive decay can lead to the death of a tooth (同)caries, dental_caries, tooth decay
space that is surrounded by something (同)enclosed space
(anatomy) a natural hollow or sinus within the body (同)bodily cavity, cavum
an elongated rectangular bone that forms the bridge of the nose (同)nasal_bone, os_nasale

PrepTutorEJDIC

へこみ,くぼみ,空洞 / 虫歯の穴 / (人体内の)腔(こう)
《名詞の前にのみ用いて》鼻の / 鼻声の / (音声が)鼻音の / (音声で)鼻音;鼻音字([m][n][g])

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/02/18 14:24:07」(JST)

wiki en

The nasal cavity (or nasal fossa) is a large air filled space above and behind the nose in the middle of the face. Each cavity is the continuation of one of the two nostrils.

Function

The term "nasal cavity" can refer to each of the two sides of the nose or to the two sides combined. The two nasal cavities condition the air to be received by the other areas of the respiratory tract. Owing to the large surface area provided by the nasal conchae (also known as turbinates), the air passing through the nasal cavity is warmed or cooled to within 1 degree of body temperature. In addition, the air is humidified, and dust and other particulate matter is removed by vibrissae, short, thick hairs, present in the vestibule. The entire mucosa of the nasal fossae is covered by a blanket of mucus, which lies superficial to the microscopic cilia and also filters inspired air, The cilia of the respiratory epithelium move the secreted mucus and particulate matter posteriorly towards the pharynx where it passes into the esophagus and is digested in the stomach. The nasal cavity also houses our sense of smell and contributes greatly to taste sensation through its posterior communication with the mouth via the choanae.

Walls

The lateral wall of each nasal cavity is mainly made up by the maxilla, however there is a deficiency that is compensated by: the perpendicular plate of the palatine bone, the medial pterygoid plate, the labyrinth of ethmoid and the inferior concha. The paranasal sinuses are connected to the nasal cavity through small orifices called ostia. Most of these ostia communicate with the nose through the lateral nasal wall, via a semi-lunar depression in it known as the infundibulum. The infundibulum is bound laterally by a projection known as the uncinate process.

The roof of each nasal cavity is formed in its upper third to one half by the nasal bone and more inferiorly by the junctions of the upper lateral cartilage and nasal septum. Connective tissue and skin cover the bony and cartilaginous components of the dorsum of the nose.

The floor of the nasal cavities, which also form the roof of the mouth, is made up by the bones of the hard palate: the horizontal plate of the palatine bone posteriorly and the palatine process of the maxilla anteriorly. To the front of the nasal cavity is the nasal vestibule and external opening, while the back blends, via the choanae, into the nasopharynx.

The nasal cavity is divided in two by a vertical fin called the nasal septum. On the sides of the nasal cavity are three horizontal outgrowths called nasal conchae (singular "concha") or turbinates. These turbinates disrupt the airflow, directing air toward the olfactory epithelium on the surface of the turbinates and the septum. The vomeronasal organ is located at the back of the septum and has a role in pheromone detection.

Cilia and mucus

Cilia and mucus along the inside wall of the nasal cavity traps and removes dust and pathogens from the air as it flows through the nasal cavity. The cilia move the mucus down the nasal cavity to the pharynx, where it can be swallowed.

Segments

The nasal cavity is divided into two segments: the respiratory segment and the olfactory segment.

The respiratory segment comprises most of each nasal fossa and is lined with ciliated pseudostratified columnar epithelium (also called respiratory epithelium). The conchae, or turbinates, are located in this region. The turbinates have a very vascularized lamina propria (erectile tissue) allowing the venous plexuses of their mucosa to engorge with blood, restricting airflow and causing air to be directed to the other side of the nose, which acts in concert by shunting blood out of its turbinates. This cycle occurs approximately every two and a half hours.
The olfactory segment is lined with a specialized type of pseudostratified columnar epithelium, known as olfactory epithelium, which contains receptors for the sense of the smell. This segment is located in and beneath the mucosa of the roof of each nasal cavity and the medial side of each middle turbinate. Histological sections appear yellowish-brown due to the presence of lipofuscin pigments. Olfactory mucosal cell types include bipolar neurons, supporting (sustentacular) cells, basal cells, and Bowman's glands. The axons of the bipolar neurons form the olfactory nerve (cranial nerve I) which enters the brain through the cribiform plate. Bowman's glands are serous glands in the lamina propria, whose secretions trap and dissolve odoriferous substances.

Blood supply

There is a rich blood supply to the nasal cavity. In some animals, such as dogs, the capillary beds flowing through the nasal cavity help cool the blood flow to the brain.

Blood supply comes from branches of both the internal and external carotid artery, including branches of the facial artery and maxillary artery. The named arteries of the nose are:^[1]

Sphenopalatine and Greater palatine arteries, branches of the maxillary artery.
Anterior Ethmoidal Artery and Posterior Ethmoidal Artery, branches of the ophthalmic artery
Septal Branches of Superior Labial Artery, a branch of the facial artery, which supplies the vestibule of the nasal cavity.

Innervation

Innervation of the nasal cavity responsible for the sense of smell is via the olfactory nerve, which sends microscopic fibers from the olfactory bulb through the cribriform plate to reach the top of the nasal cavity.

General sensory innervation is by branches of the trigeminal nerve (V₁ & V₂):

Nasociliary nerve (V₁)
Nasopalatine nerve (V₂)
Posterior nasal branches of Maxillary nerve (V₂)

There are two passages in the nasal cavity, not to be confused with nostrils.The entire nasal cavity is innervated by autonomic fibers. Sympathetic innervation to the blood vessels of the mucosa causes them to constrict, while the control of secretion by the mucous glands is carried on postganglionic parasympathetic nerve fibers originating from the facial nerve.

Diseases

Diseases of the nasal cavity include viral, bacterial and fungal infections, nasal cavity tumors, both benign and much more often malignant, as well as inflammations of the nasal mucosa. Many problems can affect the nose, including:

Deviated septum - a shifting of the wall that divides the nasal cavity into halves
Nasal polyps - soft growths that develop on the lining of your nose or sinuses
Nosebleeds
Rhinitis - inflammation of the nose and sinuses sometimes caused by allergies. The main symptom is a runny nose.
Nasal fractures, also known as a broken nose
Common cold

Additional images

Nasal cavity
Nasal cavity
Nose and nasal cavities
Normal Nose CT Front cross section
Coronal section of nasal cavities.
Anatomy of the nasal cavity
The skull from the front.
Left orbicularis oculi, seen from behind.
Lateral wall of nasal cavity.
Lateral wall of nasal cavity. (Conchae removed to reveal openings in wall.)
Medial wall (septum) of nasal cavity.
Nerves of the wall of the nasal cavity
Nasal cavity

References

^ Moore, Keith L; Dalley, Arthur F. (1999). Clinically Oriented Anatomy. Lippincott Williams & Wilkins.

External links

lesson9 at The Anatomy Lesson by Wesley Norman (Georgetown University)
Gross anatomy dissection of the nasal cavity, video [1] and [2]

UpToDate Contents

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1. 鼻症状の原因：概要 etiologies of nasal symptoms an overview
2. 鼻腔の腫瘍 tumors of the nasal cavity
3. 鼻閉塞の臨床症状、診断、および治療 clinical presentation diagnosis and treatment of nasal obstruction
4. 頭頸部腫瘍の病理 pathology of head and neck neoplasms
5. 鼻前庭癌 cancer of the nasal vestibule

English Journal

A case of recurrent malignant triton tumor successfully treated with radiotherapy.

Yasuda M1, Muto Y2, Kuremoto T2, Murakami K2, Onisihi T2, Koida A2, Inui T2, Hisa Y2.
Auris, nasus, larynx.Auris Nasus Larynx.2016 Dec;43(6):710-4. doi: 10.1016/j.anl.2016.04.003. Epub 2016 Apr 15.
A 15-year-old female was previously admitted to another hospital because of painless swelling of the lateral right nasal ala for 2 months. Magnetic resonance imaging revealed an expansive enhancing lesion in close proximity to the anterior surface of the right maxillary sinus and lateral wall of the
PMID 27146005

Prognostic factors for recurrence after endoscopic sinus surgery for chronic rhinosinusitis with nasal polyps.

Nakayama T1, Asaka D2, Kanaya H3, Kuboki A4, Haruna S3.
Auris, nasus, larynx.Auris Nasus Larynx.2016 Dec;43(6):641-7. doi: 10.1016/j.anl.2016.02.015. Epub 2016 Mar 14.
OBJECTIVE: In this study, we aimed to clarify the prognostic factors affecting the ethmoid condition during a long-term follow-up after endoscopic sinus surgery in patients with chronic rhinosinusitis with nasal polyps (CRSwNP).METHODS: Thirty-six patients with CRSwNP underwent surgery from December
PMID 26987817

Investigating the in-vitro and in-vivo flavour release from 21 fresh-cut apples.

Ting VJ1, Romano A2, Soukoulis C3, Silcock P4, Bremer PJ5, Cappellin L6, Biasioli F7.
Food chemistry.Food Chem.2016 Dec 1;212:543-51. doi: 10.1016/j.foodchem.2016.05.116. Epub 2016 May 17.
In-vitro and in-vivo flavour release from 21 different apple cultivars was studied using proton transfer reaction time-of-flight mass spectrometry (PTR-ToF-MS) with a focus on the relationship between texture and volatile organic compound (VOC) emission. Generally, firm-juicy cultivars had a shorter
PMID 27374566

Japanese Journal

齧歯類を対象とした数値気道モデル開発と鼻腔内流れの数値解析

光宗航基,山下真登,平瀬公太 [他]
日本建築学会研究報告. 九州支部. AIJ Kyushu Chapter architectural research meeting. 日本建築学会九州支部編 (54), 285-288, 2015-03
NAID 40020375158

Recurrent sebaceous carcinoma with wide intraepithelial spread to the nasal cavity: Report of two cases

Yamaguchi Nimpei,Kaneko Kenichi,Jinnouchi Shinya,Ishimaru Kotaro,Takahashi Haruo,Kinoshita Naoe,Kumagami Hidetaka
Acta medica Nagasakiensia 59(3), 107-110, 2015-03
… Local extension down the nasolacrimal duct is relatively rare event for SC.Method: We herein report two cases of recurrent SC in the nasal cavity. … Sixteen months after the initial treatment, the second patient presented with a large mass in the right nasal cavity.Results: The wide intraepithelial spread of SC over 30 mm from the initial surgical margin was beyond our expectations. …
NAID 120005593513

Nasal delivery of Japanese cedar pollen Cryj1 by using self-gelling immunostimulatory DNA for effective induction of immune responses in mice.

Ishii-Mizuno Yumiko,Umeki Yuka,Takahashi Yuki,Kato Yukinori,Takabayashi Tetsuji,Fujieda Shigeharu,Takakura Yoshinobu,Nishikawa Makiya
Journal of controlled release 200, 52-59, 2015-02-28
… After intranasal administration of the fluorescein isothiocyanate (FITC)-labeled Cryj1/sDNA hydrogel in mice, FITC-Cryj1 was retained in the nasal cavity for a longer period than FITC-Cryj1 mixed with hexapodna in solution. …
NAID 120005540394

Related Pictures

★リンクテーブル★

リンク元	「鼻腔」
関連記事	「nasal」「cavity」

「鼻腔」

Nasal cavity
	Head and neck.
	Conducting passages
Details
Identifiers
Latin	cavum nasi; cavitas nasi
MeSH	A04.531.449
TA	A06.1.02.001
FMA	54378
	Anatomical terminology [edit on Wikidata]