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Encyclopedia > Inferior concha
Bone: Inferior nasal conchae
Medial wall of left orbit. (Inferior nasal concha visible in center in yellow.)
Figure 1: Lateral wall of right nasal cavity showing inferior concha in situ. (pink)
Latin concha nasi inferior, concha nasalis inferior
Gray's subject #42 169
Articulations ethmoid, maxilla, lacrimal, palatine
Dorlands/Elsevier c_50/12253882

The inferior nasal concha (Inferior Turbinated Bone) is one of the turbinates in the nose. It extends horizontally along the lateral wall of the nasal cavity [Fig. 1] and consists of a lamina of spongy bone, curled upon itself like a scroll. Each inferior nasal concha is considered a facial pair of bones since they arise from the maxillae bones and projects horizontally into the nasal cavity. They are also termed 'inferior nasal turbinates' because they function similar to that of a turbine. As the air passes through the turbinates, the air is churned against these mucosa-lined bones in order to receive warmth, moisture and cleansing. Superior to inferior nasal concha are the middle nasal concha and superior nasal concha which arise from the cranial portion of the skull. Hence, these two are considered as a part of the cranial bones. Image File history File links Gray192. ... Image File history File links Gray170. ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... The ethmoid bone (os ethmoidale) is a bone in the skull that separates the nasal cavity from the brain. ... The maxillae are the largest bones of the face, except for the mandible, and form, by their union, the whole of the upper jaw. ... The lacrimal bone (Os Lacrimale), the smallest and most fragile bone of the face, is situated at the front part of the medial wall of the orbit. ... See Palatine Hill for geography of Rome. ... Elseviers logo. ... In anatomy, a turbinate (or nasal concha) is a long, narrow and curled bone shelf (shaped like an elongated sea-shell) which protrudes into the breathing passage of the nose. ... For the article about nose in humans, see human nose Human nose in profile Elephants have prehensile noses Dogs have very sensitive noses Anatomically, a nose is a protuberance in vertebrates that houses the nostrils, or nares, which admit and expel air for respiration. ... The nasal cavity (or nasal fossa) is a large air-filled space above and behind the nose in the middle of the face. ... This article is about the leaf, a plant organ. ... Grays Anatomy illustration of a human femur. ... The medial surface of the labyrinth of ethmoid consists of a thin lamella, which descends from the under surface of the cribriform plate, and ends below in a free, convoluted margin, the middle nasal concha. ... The back part of the medial surface of the labyrinth of ethmoid is subdivided by a narrow oblique fissure, the superior meatus of the nose, bounded above by a thin, curved plate, the superior nasal concha. ...


It has two surfaces, two borders, and two extremities.

Contents

Surfaces

The medial surface is convex, perforated by numerous apertures, and traversed by longitudinal grooves for the lodgement of vessels.


The lateral surface is concave, and forms part of the inferior meatus. ṇ The inferior meatus, the largest of the three meatuses of the nose, is the space between the inferior concha and the floor of the nasal cavity. ...


Borders

Its upper border is thin, irregular, and connected to various bones along the lateral wall of the nasal cavity.


It may be divided into three portions: of these,

  • the anterior articulates with the conchal crest of the maxilla;
  • the posterior with the conchal crest of the palatine;
  • the middle portion presents three well-marked processes, which vary much in their size and form.
    • Of these, the anterior or lacrimal process is small and pointed and is situated at the junction of the anterior fourth with the posterior three-fourths of the bone: it articulates, by its apex, with the descending process of the lacrimal bone, and, by its margins, with the groove on the back of the frontal process of the maxilla, and thus assists in forming the canal for the nasolacrimal duct.
    • Behind this process a broad, thin plate, the ethmoidal process, ascends to join the uncinate process of the ethmoid; from its lower border a thin lamina, the maxillary process, curves downward and lateralward; it articulates with the maxilla and forms a part of the medial wall of the maxillary sinus.

The inferior border is free, thick, and cellular in structure, more especially in the middle of the bone. The maxillae are the largest bones of the face, except for the mandible, and form, by their union, the whole of the upper jaw. ... See Palatine Hill for geography of Rome. ... In anatomy, a process (Latin: processus) is a projection or outgrowth of tissue from a larger body. ... The lacrimal bone (Os Lacrimale), the smallest and most fragile bone of the face, is situated at the front part of the medial wall of the orbit . ... The nasolacrimal duct carries tears from the lacrimal sac into the nasal cavity. ... Maxillary process can refer to: An alternate name for the maxillary prominence (Dorlands/Elsevier p_36/12669837) The maxillary process of inferior nasal concha (Dorlands/Elsevier p_34/12667541) Category: ... The maxillary sinus is the largest paranasal sinus. ...


Extremities

Both extremities are more or less pointed, the posterior being the more tapering.


Ossification

The inferior nasal concha is ossified from a single center, which appears about the fifth month of fetal life in the lateral wall of the cartilaginous nasal capsule.


Additional images

See also

In anatomy, a turbinate (or nasal concha) is a long, narrow and curled bone shelf (shaped like an elongated sea-shell) which protrudes into the breathing passage of the nose. ...

External links

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant. The State University of New York Health Science Center at Brooklyn, better known as SUNY Downstate Medical Center, is an academic medical center and is the only one of its kind in the Borough of Brooklyn in New York City. ... Elseviers logo. ... The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ... An illustration from the 1918 edition Henry Grays Anatomy of the Human Body, commonly known as Grays Anatomy after Henry Gray, is an anatomy textbook widely regarded as a classic work on human anatomy. ...

See also


  Results from FactBites:
 
Chapter 52: THE NOSE AND PARANASAL SINUSES (2742 words)
The olfactory region is bounded by the superior concha and the superior third of the nasal septum.
Concha is the Latin form of a Greek work meaning" shell." The inferior concha is an independent entity, whereas the others are parts of the ethmoid bone (see fig.
52-4 The olfactory region of the nasal cavity is bounded by the superior nasal concha and the superior third of the nasal septum.
  More results at FactBites »


 

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