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Meckel's cartilage
From Wikipedia, the free encyclopedia
| Meckel's cartilage | ||
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| Head and neck of a human embryo eighteen weeks old, with Meckel’s cartilage and hyoid bar exposed. | ||
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| Mandible of human embryo 95 mm. long. Inner aspect. Nuclei of cartilage stippled. | ||
| Gray's | subject #13 66 | |
| Precursor | first branchial arch | |
| Gives rise to | incus, malleus | |
| Dorlands/Elsevier | c_12/12216762 | |
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.
 Vertical section of the mandible of an early human fetus. X 25. |
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 As such, some of the information contained herein may be outdated.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.
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| Branchial region | Branchial arch (1st/Meckel's cartilage, 2nd)/Branchial pouch - Cervical sinus - Lateral lingual swelling - Tuberculum impar - Frontonasal prominence - Olfactory pit - Nasal processes - Globular process - Primitive palate - Maxillary prominence |
| Tooth development | Dental papilla - Odontoblast - Ameloblast |
| Other | Thyroglossal duct |