我们每个人的身体里,都能够制造葡萄糖。当我们吃了食物在嘴里咀嚼的时候,食物中的淀粉受了唾液里淀粉酵素的作用,开始变成葡萄糖,於是我们感觉到甜味。淀粉到了胃肠里,受着胰脏制造出来的酵素作用,进行糖化:在小肠壁由血液吸收後,输送到身体全部作为营养料。普通人体血液里常含有千分之一的葡萄糖。在我们身体组织内,葡萄糖和肺部吸进的氧气进行缓和的氧化作用,发生热量来维持体温和活动所需的能量,自身则分解成为水和碳酸气排出体外。剩馀的葡萄糖也会在肝脏内逐 In each of us, we can make glucose. When we ate the food and chewed it in our mouth, the starch in the food was affected by the amylase in the saliva and started to turn into glucose, so we felt the sweetness. Starch enters the gastrointestinal tract and is subjected to enzymes produced by the pancreas. It undergoes saccharification: after being absorbed by the blood in the wall of the small intestine, it is delivered to the body as a nutrient. Ordinary human blood often contains one thousandth of glucose. In our body tissues, oxygen absorbed by glucose and lungs undergoes moderate oxidation, and heat is generated to maintain body temperature and the energy required for activity, and is decomposed into water and carbonic acid gas itself. The remaining glucose will also move through the liver.