develops from develops from artery pharyngeal arch artery 2 opercular artery ZFA:0005022 external carotid artery This class was sourced from an external ontology (teleost_anatomy). Its definitions, naming conventions and relationships may need to be checked for compatibility with uberon UBERON:2005022 ORA The opercular artery arises from the hyoid stump on the first aortic arch, then follows the lateral margin of the operculum (gill covering) ventrally to reconnect into the proximal part of the first aortic arch. Isogai et al. 2001.