Saliva is a clear, watery fluid produced by the salivary glands in the mouth. It plays a crucial role in digestion by helping to break down food and making it easier to swallow. Saliva contains enzymes, such as amylase, which begin the process of breaking down carbohydrates. It also helps keep the mouth moist and aids in maintaining oral health by washing away food particles and neutralizing acids. In addition to its digestive functions, saliva has antibacterial properties that help protect the mouth from infections. It contains proteins and antibodies that contribute to the immune response. Overall, saliva is essential for both digestion and oral hygiene.