舌是味觉器官,它能辨别酸、甜、苦、咸等味。舌的不同部位对各种味的刺激的敏感度是不相同的,可用下面实验来验证。取4只玻璃杯和1只水壶,每只玻璃杯内盛半杯凉开水。第1只杯子内放一匙糖,第2只杯子内放小半匙盐,第3只杯子内放适量的阿斯匹林,加以研细调和,第4只杯子内放适量食醋,再用脱脂棉球做几根牙签备用。为防止唾液把试验物转移到口腔的其它部位,在试验之前,用一张干净的吸水纸把舌头擦干,然后用棉花签在糖水溶液中蘸几下,以刚吸饱为度,再拿它依次去触及舌的尖端、中部,边缘和舌根近处,仔细辨别,可发现对甜味最敏感的是舌尖。做完这个试验后,用凉开水漱口,再用吸水纸擦干 Tongue is a taste organ, which can distinguish sour, sweet, bitter, salty and other flavors. The sensitivity of different parts of the tongue to the stimulation of various flavors is not the same, can be verified by the following experiment. Take 4 glasses and 1 water bottle, each cup holds half a cup of cold water. Put a spoonful of sugar in the first cup, half a spoonful of salt in the second cup, aspirin in the third cup, finely ground and reconciled, put the right amount of vinegar in the fourth cup, Tissue cotton balls do a few toothpicks spare. To prevent the saliva from transferring the test substance to other parts of the oral cavity, dry the tongue with a piece of clean water-absorbent paper before testing, then use a cotton swab to dip in the sugar solution for several times to just aspirate it, It in turn touches the tip of the tongue, the middle, the edge and the vicinity of the base of the tongue, carefully discerned, you can find the most sensitive to the sweetness of the tongue. After doing this test, rinse mouth with cold water and dry with absorbent paper