Functions of secretion 1. Moisten food 2. Begin chemical digestion(a amylase, tE 粉酶) 3. Adjust appetite 4. Bacteriostatic action(抑菌作用 ( bacteriolysis,溶菌素)6 Functions of secretion 1. Moisten food 2. Begin chemical digestion (a amylase, 淀 粉酶) 3. Adjust appetite 4. Bacteriostatic action （抑菌作用) (bacteriolysin, 溶菌素)