论文部分内容阅读
人类为万物之灵长。早在古时候人们就猜想,人体的神奇之躯一定由一些很不寻常的物质组成。18世纪中叶瑞典化学家加恩发现人的骨骼是由磷酸钙组成。19世纪由于有机化学分析技术的发展,人们知道了活组织主要是由碳、氢、氧、氮四种元素组成(约占人体元素总量96%)。随后科学家们又发现钾和镁在所有细胞中都存在,而钠和氯则是以盐的形式存在于体液中。现在
Human beings are the priests of all things. As early as in ancient times, people had to guess that the magical body of the human body must be composed of some very unusual things. In the mid-18th century Swedish chemist Garn found that human bones are made of calcium phosphate. The 19th century due to the development of organic chemical analysis technology, it is known that the living tissue is mainly composed of carbon, hydrogen, oxygen and nitrogen (about 96% of the total body elements). Then scientists also found that potassium and magnesium are present in all cells, while sodium and chlorine are in the form of salt in body fluids. just now