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就人体的化学和分子生物学本质而言,任何复杂的生命物质都是由元素组成的。人体内的所有元素,依照其在体内的含量多少分为宏量元素与微量元素两类。微量元素相对于宏量元素,在体内的含量相对较少。宏量元素在人体内约有12种,共占人体总重量的99.95%;而微量元素多达41种,只占人体总重
In terms of the chemical and molecular biology of the human body, any complex living matter is composed of elements. All the elements in the human body, according to their content in the body divided into two types of macroelements and trace elements. Trace elements relative to the macro elements, the content in the body is relatively small. Macro elements in the human body about 12 kinds, accounting for 99.95% of the total body weight; and up to 41 trace elements, only the total body weight