Meckel's cartilage 4187864 163865377 2007-10-11T19:06:55Z Arcadian 104523 {{Embryology of head and neck}} {{Infobox Embryology | Name = {{PAGENAME}} | Latin = | GraySubject = 13 | GrayPage = 66 | Image = Gray43.png | Caption = Head and neck of a human embryo eighteen weeks old, with Meckel’s cartilage and hyoid bar exposed. | Image2 = Gray181.png | Caption2 = Mandible of human embryo 95 mm. long. Inner aspect. Nuclei of cartilage stippled. | System = | CarnegieStage = | Days = | Precursor = [[first branchial arch]] | GivesRiseTo = [[incus]], [[malleus]] | MeshName = | MeshNumber = | DorlandsPre = c_12 | DorlandsSuf = 12216762 | }} The cartilaginous bar of the [[mandibular arch]] is formed by what are known as '''Meckel’s cartilages''' (right and left) ; above this the [[incus]] is developed. The dorsal end of each cartilage is connected with the ear-capsule and is ossified to form the [[malleus]]; the ventral ends meet each other in the region of the [[symphysis menti]], and are usually regarded as undergoing [[ossification]] to form that portion of the [[mandible]] which contains the [[incisor teeth]]. The intervening part of the cartilage disappears; the portion immediately adjacent to the malleus is replaced by fibrous membrane, which constitutes the [[sphenomandibular ligament]], while from the connective tissue covering the remainder of the cartilage the greater part of the mandible is ossified. ==Additional images== <gallery> Image:Gray1011.png|Vertical section of the mandible of an early human fetus. X 25. </gallery> ==External links== * [http://www.palaeos.com/Vertebrates/Bones/Gill_Arches/Meckelian.html palaeos.com] * {{WhoNamedIt|synd|2049}} {{Gray's}} {{musculoskeletal-stub}} {{developmental-biology-stub}} {{Embryology of head and neck}}[[Category:Embryology]]