Term Name:	cervical sinus of His
Synonyms:	cervical sinus, retro-hyoid depression, sinus cervicalis
Definition:	A temporary depression caudal to the second pharyngeal arch, containing the succeeding pharyngeal arches; it is overgrown by the second pharyngeal arch and closes off as the cervical vesicle. This sinus is bounded in front by the hyoid arch, and behind by the thoracic wall.
Ontology:	Uberon Ontology [UBERON:0006216]