The first of the series of pharyngeal arches that develop into jaw bones or their homologs, and their associated nerves and arteries.
Comment:
[homology-note] "A conserved feature of all vertebrate embryos is the presence of a series of bulges on the lateral surface of the head, the pharyngeal arches; it is within these structures that the nerves, muscles and skeletal components of the pharyngeal apparatus are laid down. The pharyngeal arches are separated by endodermal outpocketings, the pharyngeal pouches.[well established][VHOG]" xsd:string {date_retrieved="2012-09-17", external_class="VHOG:0000296", ontology="VHOG", source="DOI:10.1111/j.1469-7580.2005.00472.x Graham A, Okabe M and Quinlan R, The role of the endoderm in the development and evolution of the pharyngeal arches. J Anat (2005)", source="http://bgee.unil.ch/"}
Synonyms:
exact_synonym:
1st pharyngeal arch; branchial arch 1; first branchial arch; first pharyngeal arch; first visceral arch; mandibular arch; visceral arch 1
related_synonym:
1st arch; 1st visceral arch; arcus pharyngeus primus