part of capable of foregut salivary gland FBbt:00005382 fly_anatomy.ontology UBERON:0001044 Paired secretory organ connected to the atrium via the salivary duct. It is essentially composed of two cell types: cuboidal epithelial duct cells that form tubes connecting the secretory cells to the larval mouth; and secretory cells that synthesize and secrete high levels of protein (Andrew et al., 2000). gland saliva secretion