Pharyngeal Arch

Pharyngeal Arch

In the development of vertebrate animals, the pharyngeal arches (which develop into the branchial arches or gill arches in fish) are anlage for a multitude of structures. In humans, they develop during the fourth week in utero as a series of mesodermal outpouchings on the left and right sides of the developing pharynx. In fish, the branchial arches support the gills.

Read more about Pharyngeal Arch:  Development, Relations, Specific Arches, Use in Staging, See Also

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Pharyngeal Slit - Pharyngeal Arches in Vertebrates
... In vertebrates, the pharyngeal arches are derived from all three germ layers ... However, the existence of pharyngeal structures before neural crest cells evolved is indicated by the existence of neural crest-independent mechanisms of pharyngeal arch ... The first, most anterior pharyngeal arch gives rise to the oral jaw ...

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