为什么我们的口腔总是湿漉漉的?为什么见到美味会“垂涎三尺”?为什么“望梅”能够“止渴”?——这都是唾液的作用,称之为“津液”。唾液是由唾液腺分泌出来的。人体的唾液腺很多,主要有三对:腮腺最大,长红5.6厘米;颌下腺次之;舌下腺最小。唾液无色、无味、略带混浊、易起泡,是一种含有99％的水分和1％的粘蛋白、激素、钾、钠、钙等的混合物,最重要的是,它还含有能消化碳水化合物的唾液淀粉酶。酸最能刺激唾液的分泌,冰、凉水、美味佳肴也能增加其分泌量。就是这普普通通的唾液,功用却不少。它能浸润食物,使食物顺利通过口腔、咽喉、食道而进入胃;它具有溶解稀释和刺激味蕾引起味觉的作用,帮助舌头辨别酸甜苦辣;当过酸、过甜、过辣的食物进入口腔时,唾液腺大量分泌唾液、立即以稀释、中和,以减轻口腔乃 Why is our mouth always wet? Why to see delicious will “coveted” Why “Wang Mei” can “quench thirst”? - This is the role of saliva, called “body fluid.” Saliva is secreted by the salivary glands. The body’s salivary glands are many, there are three pairs: the largest parotid gland, red 5.6 cm; submandibular gland followed; the smallest sublingual gland. Saliva colorless, odorless, slightly cloudy, easy to foam, is a mixture of 99% moisture and 1% mucin, hormones, potassium, sodium, calcium and the like, and most importantly it contains digestible Carbohydrate salivary amylase. Acid most stimulates the secretion of saliva, ice, cold water, delicious food can also increase its secretion. This is the common saliva, but a lot of function. It can infiltrate food and make the food smoothly enter the stomach through the mouth, throat and esophagus. It has the function of dissolving dilution and stimulating the taste buds to help the tongue to distinguish between sweet and sour. When the food that is too sour, too sweet or too hot enters the mouth, Salivary glands secrete large amounts of saliva immediately to dilute, and in order to reduce the mouth is