CBSE Class 10 Answered

Functions of saliva in digestion of food:

• Salivary amylase present in saliva converts starch into maltose and dextrose sugars.
• Mucus present in saliva lubricates food and thus helps in the swallowing of food.
• Saliva moistens and lubricates the inner lining of the mouth cavity and the surface of the tongue and helps us in speaking.
• Saliva acts as a solvent for some food particles and stimulates the taste buds of the tongue.
• It helps to convert food into a soft ball called bolus, which can easily pass through the pharynx.
• Saliva cleans the mouth and prevents the growth of germs in the mouth, thus curbing tooth decay.
• When water content of saliva is less, it leads to dryness in the mouth and induces the feeling of thirst. On drinking water, the water balance of the body is maintained.