part of develops from salivary gland imaginal ring adult digestive system adult salivary gland FBbt:00003135 fly_anatomy.ontology The salivary gland of the adult. It consists of two slender long, unbranched epithelial tubes of secretory epithelium that taper to form narrow ducts at their anterior end, which join to an unpaired duct (FBbt:00003137) in the neck region. The common duct connects to the salivary canal which runs through the hypopharynx and opens at its tip into the labial groove. The posterior ends of the lobes of the gland extend straight through the thorax on either side of the ventriculus and end in compact blind coils in the base of the abdomen. A suspensory muscle (FBbt:00003542) is attached to the anterior end of each lobe, near the cardia. (Miller, 1950 pg 440-1, 451). salivary gland ventral ectoderm derivative