sial/o is the combining form that refers to “saliva”, “salivary gland” or “salivary duct”.
Each salivary gland is located on one side of the face. They produce saliva (also called spit), which serves as the lubricating substance for the mouth and throat. Saliva contains enzymes that initiate digestion of foods as soon as they enter the mouth. Furthermore, it contains antibodies that protect against infections of the mouth and throat.
