Saliva is a watery fluid that is secreted by the salivary glands present in the mouth. The functions of saliva start from the moistening of food that results in the formation of a food bolus, this food bolus can be easily swallowed and thus saliva helps in the process of digestion of food starting from the mouth. Saliva breaks down starch into maltose and dextrin with the help of an enzyme amylase present in it.