Corpus: Meckel's cartilage
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after Johann Friedrich Meckel von Helmsbach (1781-1833), German anatomist
Synonym: Cartilago meckeli
English:
Definition[Bearbeiten]
The Meckel's cartilage is a cartilage clasp of the 1st gill arch. It serves as a passagere guiding structure for the attachment of the mandible, which develops laterally of the Meckel's cartilage by replacement ossification, i.e. the cartilage is completely degraded and the bone is completely newly formed.
Embyrology[Bearbeiten]
By the 24th week of embryonic development, Meckel's cartilage has largely regressed. The following structures develop from its two dorsal ends on both sides:
- ossicles
- Malleus (hammer)
- Incus (anvil)
- Ligamentum sphenomandibulare
In addition, the Meckel cartilage induces the formation of the mandible in the neighbouring mesenchyme.