File:Pharyngeal arch cartilages.jpg: Difference between revisions

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Pharyngeal Arch Cartilages

Meckel's cartilage - located within the first pharyngeal arch mandibular prominence, forms a cartilage "template" besides which the mandible develops by the process of intramembranous ossification. It is important to note that this cartilage template does not ossify (endochondral ossification) but provides a transient structure where the mandible will form, and later degenerates. The ends of this "U" shaped cartilage form two of the middle ear ossicles (malleous and incus).

Reichert's cartilage - located within the second pharyngeal arch. The ends of this "U" shaped cartilage form the stapes of the middle ear ossicles.

Links: Middle Ear | Skull Development | Head Development

Source: UNSW Embryology

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	23:41, 13 May 2009		400 × 324 (26 KB)	MarkHill (talk \| contribs)	Pharyngeal Arch cartilages Source: UNSW Embryology

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 ==Pharyngeal Arch Cartilages==
+'''Meckel's cartilage''' - located within the first pharyngeal arch mandibular prominence, forms a cartilage "template" besides which the mandible develops by the process of intramembranous ossification. It is important to note that this cartilage template does not ossify (endochondral ossification) but provides a transient structure where the mandible will form, and later degenerates. The ends of this "U" shaped cartilage form two of the middle ear ossicles (malleous and incus).
-* '''Meckel's cartilage''' - located within the first pharyngeal arch mandibular prominence, forms a cartilage "template" besides which the mandible develops by the process of intramembranous ossification. It is important to note that this cartilage template does not ossify (endochondral ossification) but provides a transient structure where the mandible will form, and later degenerates.
+'''Reichert's cartilage''' -  located within the second pharyngeal arch. The ends of this "U" shaped cartilage form the stapes of the middle ear ossicles.
-:'''Links:''' [[Musculoskeletal_System_-_Skull_Development|Skull Development]] | [[Head Development]]
+:'''Links:''' [[Hearing_-_Middle_Ear_Development|Middle Ear]] | [[Musculoskeletal_System_-_Skull_Development|Skull Development]] | [[Head Development]]