迄今已发现地壳表层存在的90多种元素几乎都能在人体内找到。目前,一般认为14种微量元素是人类和动物所必需的,其中除氟和碘外均为金属元素,其原子序数全部处于原素周期表前53个。它们绝大多数与体内有机物构成复合物,以酶、激素及组成细胞结构等形式维持正 So far, it has been found that more than 90 elements existing on the surface of the earth’s crust can be found in the human body. At present, 14 kinds of trace elements are generally considered to be necessary for humans and animals, of which metal elements except for fluorine and iodine all have atomic numbers all of which are in the top 53 of the Periodic Table of the Elements. Most of them form a complex with the body of organic matter, in the form of enzymes, hormones and cell structure to maintain positive