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are thought to have become the jaw itself and the hyoid arch, respectively. The hyoid system suspends the jaw from the braincase of the skull, permitting great mobility of the jaws. While there is no fossil evidence directly to support this theory, it makes sense in light of the numbers of
246:) that pumps water across the gills of fish or air into the lungs in the case of amphibians. Over evolutionary time the more familiar use of jaws (to humans), in feeding, was selected for and became a very important function in vertebrates. Many
493:
Anderson, Philip S.L; Westneat, Mark (28 November 2006). "Feeding mechanics and bite force modelling of the skull of
Dunkleosteus terrelli, an ancient apex predator". Biology Letters. pp. 77–80.
468:
Smith, M.M.; Coates, M.I. (2000). "10. Evolutionary origins of teeth and jaws: developmental models and phylogenetic patterns". In
Teaford, Mark F.; Smith, Moya Meredith; Ferguson, Mark W.J. (eds.).
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that constituted the anterior tip of the upper jaw in reptiles has reduced in size; and most of the mesenchyme at the ancestral upper jaw tip has become a protruded mammalian
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The original selective advantage offered by the jaw may not be related to feeding, but rather to increased respiration efficiency. The jaws were used in the
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have two sets of jaws: the oral jaws that capture prey and the pharyngeal jaws that advance into the mouth and move prey from the oral jaws to the
322:. Some species have jaw bones completely fused, while others may have joints allowing for mobility of the dentary, quadrate, or maxilla. The
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is also broadly applied to the whole of the structures constituting the vault of the mouth and serving to open and close it and is part of the
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Higashiyama, Hiroki; Koyabu, Daisuke; Hirasawa, Tatsuya; Werneburg, Ingmar; Kuratani, Shigeru; Kurihara, Hiroki (November 2, 2021).
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is a common disorder of these joints, characterized by pain, clicking and limitation of mandibular movement. Especially in the
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is substantially simplified compared to fish. Most of the upper jaw bones (
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This article is about the anatomical part. For the village in
Bahrain, see
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are a pair of opposable articulated structures at the entrance of the
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pharyngeal arches that are visible in extant jawed vertebrates (the
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Allin EF (December 1975). "Evolution of the mammalian middle ear".
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possess unique jaws which display five-part symmetry, termed the
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Opposable articulated structure at the entrance of the mouth
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472:. Cambridge: Cambridge University Press. p. 145.
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The vertebrate jaw probably originally evolved in the
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598:(2nd ed.). Ames, Iowa: Wiley-Blackwell.
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621:"Mammalian face as an evolutionary novelty"
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338:In mammals, the jaws are made up of the
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596:Manual of temporomandibular disorders
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594:Wright, Edward F. (2010).
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678:Medical Subject Headings
415:composed of crystalline
376:temporomandibular joints
222:. The two most anterior
33:Jawbone (disambiguation)
23:. For the mountain, see
1293:Anterior lacrimal crest
638:10.1073/pnas.2111876118
565:10.1002/jmor.1051470404
181:
1457:Sphenopalatine foramen
1453:Greater palatine canal
1264:Greater palatine canal
715:Human regional anatomy
499:10.1098/rsbl.2006.0569
429:Muscles of mastication
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27:. For other uses, see
1673:Inferior nasal concha
1530:Mandibular prominence
1443:Posterior nasal spine
1418:Pterygopalatine fossa
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131:) are modified legs.
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74:Further information:
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29:Jaws (disambiguation)
1534:Mandibular symphysis
1324:Anterior nasal spine
1237:Maxillary tuberosity
1221:Anterior nasal spine
1211:Infraorbital foramen
346:(upper jaw). In the
342:(lower jaw) and the
235:), which have nine.
46:viewed from the left
1783:Human head and neck
1572:Submandibular fovea
1542:Mental protuberance
1449:Perpendicular plate
1248:Infraorbital groove
631:(44): e2111876118.
408:Aristotle's lantern
88:The mandibles of a
1611:Mandibular foramen
1382:Zygomaticotemporal
1372:Zygomatico-orbital
1316:Foramina of Scarpa
1253:Infraorbital canal
434:Otofacial syndrome
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176:great white shark
161:pharyngeal arches
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1205:Canine fossa
1196:
855:Adam's apple
816:
628:
624:
614:
595:
589:
556:
552:
546:
488:
469:
463:
449:Rostral bone
406:
401:
352:simian shelf
337:
265:
237:
229:Gnathostomes
206:
156:
152:
138:
124:
120:
110:
104:
94:
59:
51:
49:
1735:Prognathism
1463:Hard palate
444:Prognathism
403:Sea urchins
398:Sea urchins
324:snake skull
266:The jaw in
240:buccal pump
141:vertebrates
135:Vertebrates
121:mastication
1777:Categories
1656:Nasal bone
1489:Sphenoidal
1289:Agger nasi
1022:Fingernail
553:J. Morphol
534:|url=
455:References
439:Predentary
388:premaxilla
304:surangular
272:premaxilla
244:amphibians
191:Moray eels
174:Jaws of a
117:mouthparts
112:chelicerae
97:arthropods
70:Arthropods
1479:Pyramidal
1472:Processes
1360:Zygomatic
1273:Processes
938:Genitalia
356:articular
316:tetrapods
308:articular
268:tetrapods
213:Placoderm
195:esophagus
157:lower jaw
153:upper jaw
129:pedipalps
106:mandibles
101:chitinous
64:body plan
44:lower jaw
1713:Lacrimal
1503:Mandible
1403:Palatine
1193:Anterior
1186:Surfaces
1067:Buttocks
987:Shoulder
822:Mandible
755:Forehead
657:34716275
581:25886311
525:cite web
517:17443970
423:See also
360:quadrate
340:mandible
312:mandible
296:splenial
288:quadrate
220:Devonian
209:Silurian
203:Fish jaw
139:In most
90:bull ant
1767:Anatomy
1604:Lingula
1484:Orbital
1244:Orbital
1178:Maxilla
1168:of the
1112:Toenail
1002:Forearm
948:Scrotum
894:Midriff
884:Abdomen
877:(Trunk)
827:Occiput
770:Eyebrow
648:8673075
573:1202224
508:2373817
374:by the
344:maxilla
334:Mammals
300:angular
292:dentary
276:maxilla
248:teleost
233:Agnatha
125:chewing
25:The Jaw
1753:Portal
1432:Plates
1411:Fossae
1197:fossae
1047:Little
1037:Middle
1017:Finger
992:Axilla
933:Pelvis
926:Nipple
921:Breast
916:Thorax
860:Throat
837:Temple
800:Tongue
780:Eyelid
680:(MeSH)
655:
645:
602:
579:
571:
515:
505:
476:
386:, the
306:, and
286:, and
155:and a
42:Human
1706:Other
1690:Vomer
1616:Angle
1587:Ramus
1334:Other
1260:Nasal
1170:skull
1097:Ankle
1077:Thigh
1032:Index
1027:Thumb
1007:Wrist
997:Elbow
970:Limbs
953:Vulva
943:Penis
899:Navel
889:Waist
875:Torso
832:Scalp
805:Tooth
790:Mouth
760:Cheek
577:S2CID
413:tooth
280:jugal
165:teeth
56:mouth
1695:Wing
1649:Nose
1522:Chin
1511:Body
1164:The
1117:Sole
1102:Heel
1092:Foot
1087:Calf
1082:Knee
1042:Ring
1012:Hand
960:Anus
911:Back
865:Nape
847:Neck
785:Nose
765:Chin
750:Face
745:Hair
737:Head
729:Skin
723:Body
653:PMID
625:PNAS
600:ISBN
569:PMID
538:help
513:PMID
474:ISBN
392:nose
254:and
216:fish
182:Fish
145:bony
78:and
60:jaws
52:jaws
50:The
31:and
21:Jaww
1526:Jaw
1455:,
1107:Toe
1072:Hip
1059:Leg
979:Arm
817:Jaw
812:Ear
795:Lip
775:Eye
674:Jaw
643:PMC
633:doi
629:118
561:doi
557:147
503:PMC
495:doi
348:ape
147:or
123:or
109:or
95:In
1779::
1570:,
1566:,
1562:,
1548:,
1544:,
1540:,
1536:,
1532:,
1528:,
1524:,
1322:,
1318:,
1314:,
1310:,
1291:,
1262::
1246::
1230::
1203:,
1195::
651:.
641:.
627:.
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575:.
567:.
555:.
529::
527:}}
523:{{
511:.
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419:.
394:.
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302:,
298:,
294:,
282:,
278:,
274:,
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1441:(
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1390:(
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1370:(
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1199:(
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700:t
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635::
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563::
540:)
536:(
519:.
497::
482:.
35:.
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