Artwork of the location and anatomy of the human salivary glands. The glands are shown in their location in the human head at far left. These include the sublingual gland (below the tongue), submandibular gland (below the lower jaw bone), and the parotid gland (below and near the ear). A magnified view is at centre, showing the duct structure. A further magnified view at far right shows the acinar structure, where salivary fluids are secreted in lobes and channelled to a central duct (centre) to be released into the mouth. Saliva contains enzymes that aid the digestion of food.