8 2. Digestion in the mouth esophagus ● Saliva& its function k Nature composition of saliva pH6.6~7.1,99% water Salivary amylase, lysozyme, salt, etc. *k Functions of saliva Moisten the cavity solve food; keep the mouth clean; anti-bacteria; digest starch k Regulation of salivary secretion Pure neuroregulation Conditioned unconditioned reflex§ 2. Digestion in the mouth & esophagus • Saliva & its function * Nature & Composition of saliva pH 6.6~7.1, 99% water Salivary amylase, lysozyme, salt, etc. * Functions of saliva Moisten the cavity & solve food; keep the mouth clean; anti-bacteria; digest starch * Regulation of salivary secretion Pure neuroregulation Conditioned & unconditioned reflex