Vomer
Vomer | |
---|---|
Details | |
Identifiers | |
Latin | vomer |
MeSH | D055172 |
TA98 | A02.1.11.001 |
TA2 | 751 |
FMA | 9710 |
Anatomical terms of bone |
The vomer (
In humans
The vomer is situated in the median plane, but its anterior portion is frequently bent to one side.
It is thin, somewhat quadrilateral in shape, and forms the hinder and lower part of the nasal septum; it has two surfaces and four borders.
The surfaces are marked by small furrows for blood vessels, and on each is the nasopalatine groove, which runs obliquely downward and forward, and lodges the nasopalatine nerve and vessels.
Borders
The superior border, the thickest, presents a deep furrow, bounded on either side by a horizontal projecting expansion of bone – called the wing of vomer; the furrow receives the
The inferior border articulates with the crest formed by the maxillæ and palatine bones.
The anterior border is the longest and slopes downward and forward. Its upper half is fused with the
The posterior border is free of bony articulation, having no muscle attachments. It is concave, separates the choanae, and is thick and bifid above, thin below.
Articulations
The human vomer
- two of the cranium, the sphenoid and ethmoid.
- four of the face, two maxillae; and two palatine bones.
It also articulates with the septal cartilage of the nose.
Vomeronasal organ
The
In other animals
In
In some living salamanders, including the mudpuppy, the maxilla is absent and therefore the vomerine teeth fulfill a major functional role in the upper jaw.[5]
In mammals, the vomers have become narrower still, and are fused into a single, vertically oriented bone. The development of the hard palate beneath the vomer means that the bone is now located in a nasal chamber, separate from the mouth.[4]
Additional images
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Median wall of left nasal cavity showing vomer in situ.
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The vomer.
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Base of skull. Inferior surface.
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Sagittal section of skull.
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Vomer
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Vomer
See also
- Choana – Each of two openings from the nasal cavity to the throat
References
This article incorporates text in the public domain from page 170 of the 20th edition of Gray's Anatomy (1918)
- OED2nd edition, 1989.
- ^ Entry "vomer" in Merriam-Webster Online Dictionary.
- ^ Illustrated Anatomy of the Head and Neck, Fehrenbach and Herring, Elsevier, 2012, page 52
- ^ ISBN 0-03-910284-X.
- OCLC 62732645.
External links
- Anatomy photo:33:st-0232 at the SUNY Downstate Medical Center – "Nasal Cavity: Bones"
- Anatomy figure: 33:02-03 at Human Anatomy Online, SUNY Downstate Medical Center – "Diagram of skeleton of medial (septal) nasal wall."
- lesson9 at The Anatomy Lesson by Wesley Norman (Georgetown University) (nasalseptumbonescarti)
- Atlas image: rsa1p7 at the University of Michigan Health System – "Nasal septum, lateral view"
- "Anatomy diagram: 34256.000-1". Roche Lexicon – illustrated navigator. Elsevier. Archived from the original on 2012-12-27.
- "Anatomy diagram: 34257.000-1". Roche Lexicon – illustrated navigator. Elsevier. Archived from the original on 2012-07-22.