摘要
人类是大自然的产物,是由多种元素组成的生命体,同时又是各种化学反应密切配合的体系。人体与外界环境存在着物质和能量的交换。人类生存需要各种常量元素和微量元素,维持人体正常机能所必需的Fe,Cu,Zn,Sr,F,I,Se,Si等微量元素,无论缺乏或过量都会导致人体产生疾病;而Cd等无生物功能作用的微量元素,对人体只能有毒害作用。
Human being is one of the results from the development of the nature. It is made up of many kinds of elements, and also is a system which chemical reactions cooperate with each other. Human body exchanges materials and energy with environment. Human survives demands many macroelements and microelements. Some microelements as Fe, Cu, Zn, Sr, F, I, Se and Si which can keep demands of normal mechanism of human being, if they are lack or over, people will fall ill, while some elements such as Cd which have no biological function will do harm to human being.
出处
《山东地质》
2003年第C00期40-43,共4页
Geology of Shandong
关键词
微量元素
地质
环境
人体健康
常量元素
长寿
有毒元素
必需元素
Trace element
people′s health
geological environment
macroelement
essential element
harmful element
