part of continuous with adult head adult tracheal section adult cibarial muscle tracheal branch Tracheal branch of the adult head that splits anteroventrally from each frontal air sac and joins with the branch of the opposite side. It supplies small branches to the pumping muscles of the cibarium. cibarial muscle trachea fly_anatomy.ontology FBbt:00003100 frontal head air sac cibarial muscle cell tracheal branch