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.
Other articles related to "pharyngeal arch, pharyngeal":
... 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 ...
Famous quotes containing the word arch:
“An arch never sleeps.”
—East Indian saying.