part_of adult salivary ducts adult salivary duct lumen TADS:0000542 TADS:0000542 The cavity of the salivary duct. The lumina of the paired salivary ducts join to form the lumen of the salivarium. Salivary secretions from the acini of the salivary glands flow through the main salivary ducts into the salivarium and are expelled via thepreoral canal to the exterior. default_namespace anatomical space