- Nasal bone
Bone: Nasal bone Nasal bone visible at center, in dark green. Cartilages of the nose. Side view. (Nasal bone visible at upper left.) Latin os nasale Gray's subject #37 156
The nasal bones are two small oblong bones, varying in size and form in different individuals; they are placed side by side at the middle and upper part of the face, and form, by their junction, "the bridge" of the nose.
Each has two surfaces and four borders.
The outer surface is concavoconvex from above downward, convex from side to side; it is covered by the Procerus and Compressor naris, and perforated about its center by a foramen, for the transmission of a small vein.
The inner surface is concave from side to side, and is traversed from above downward, by a groove for the passage of a branch of the nasociliary nerve.
In other animals
In primitive bony fish and tetrapods, the nasal bones are the most anterior of a set of four paired bones forming the roof of the skull, being followed in sequence by the frontals, the parietals, and the postparietals. Their form in living species is highly variable, depending on the shape of the head, but they generally form the roof of the snout or beak, running from the nostrils to a position short of the orbits. In most animals, they are generally therefore proportionally larger than in humans or great apes, because of the shortened faces of the latter. Turtles, unusually, lack nasal bones, with the prefrontal bones of the orbit reaching all the way to the nostrils.
- nasal+bone at eMedicine Dictionary
- SUNY Figs 22:02-07 - "Anterior view of skull."
- SUNY Labs 29:st-0206 - "Orbits and Eye: Bones"
- SUNY Figs 33:01-03 - "The bones of the lateral nasal wall."
- Roche Lexicon - illustrated navigator, at Elsevier 34256.000-1
Bones of head and neck: the facial skeleton of the skull (TA A02.1.08–15, GA 2.156–177) MaxillaSurfacesProcessesOther Zygomatic PalatineFossaePlatesProcesses Mandible Minor/
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Look at other dictionaries:
nasal bone — n either of two bones of the skull of vertebrates above the fishes that lie in front of the frontal bones and in humans are oblong in shape forming by their junction the bridge of the nose and partly covering the nasal cavity * * * either of a… … Medical dictionary
nasal bone — noun an elongated rectangular bone that forms the bridge of the nose • Syn: ↑nasal, ↑os nasale • Derivationally related forms: ↑nasal (for: ↑nasal) • Hypernyms: ↑bone, ↑ … Useful english dictionary
nasal bone — a paired dermal bone occurring between the premaxilla and the prefrontal, antorbital or lachrymal on either side of the snout and usually enclosing the nares. Lepisosteus has three nasals, prenasal or rostral, adnasal or nasal and premaxillo… … Dictionary of ichthyology
nasal bone — noun Either of two small oblong bones which form, by their junction, the bridge of the nose … Wiktionary
nasal bone — either of a pair of narrow oblong bones that together form the bridge and root of the nose. See: skull … The new mediacal dictionary
ethmoidal sulcus of nasal bone — sulcus ethmoidalis ossis nasalis [TA] ethmoidal groove: a groove that extends the entire length of the posteromedial surface of the nasal bone and lodges the external nasal branch of the anterior ethmoid nerve … Medical dictionary
Кость Носовая (Nasal Bone) — парная узкая, продолговатой формы кость лицевого черепа. Обе кости, соединяясь между собой, образуют спинку носа. См. Череп. Источник: Медицинский словарь … Медицинские термины
Nasal surface of the body of the maxilla — Bone: Nasal surface of the body of the maxilla Left maxilla. Nasal surface. Latin facies nasalis corporis maxillae Gray s … Wikipedia
Nasal foramina — Right nasal bone. Outer surface. Latin foramina nasalia The nasal foramina are foramina which run through the nasal bones. External … Wikipedia
Nasal — may refer to: Nose, a protuberance in vertebrates that houses the nostrils, or nares, which admit and expel air for respiration in conjunction with the mouth Nasal bone, two small oblong bones placed side by side at the middle and upper part of… … Wikipedia