有些爱吃零食,不爱运动,营养过剩的同学喜欢吃汤泡饭,特别是没有对味口的菜肴时更是如此。其实这种习惯很不好。我们吃进肚里的食物,先要在口腔作初加工,这对消化食物有三项作用:第一,坚硬的牙齿就像一部粉碎机,细细咀嚼,可把食物磨碎;第二,唾液腺像洒水机那样不断分泌出唾液,舌头又像搅拌机似的将唾液与食物拌在一起,唾液里的淀粉酶,就可和食物中的淀粉发生化 Some love to eat snacks, do not love sports, over-nutrition students like to eat soup with rice, especially if there is no taste of the dishes even more so. In fact, this habit is not good. We eat the food inside the stomach, first in the mouth for the first processing, which has three effects on digestion of food: First, hard teeth like a shredder, chewing carefully, the food can be ground; Second, Salivary glands like sprinklers that continue to secrete saliva, the tongue like a mixer like saliva mixed with food, saliva amylase, starch and food can occur