Saliva is 98-99% water. It contains digestive enzymes, in particular amylase, which break down complex carbohydrates to simple carbohydrates, in particular, starch is broken down to glucose. Therefore, the digestion of carbohydrates begins already in the mouth. An important condition for the effective work of saliva enzymes is its slightly alkaline reaction. The formation of a food lump and its covering with mucus is provided by mucin. Saliva also contains lysozyme. It is a bactericidal substance that partially disinfects food by destroying bacteria that enter the oral cavity.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.