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一、人体内必需元素 自然环境中的元素,几乎都存在于人体中。人类活质结构的99％是由元素周期表中的前20种元素中的大部分丰量元素组成。元素周期表中第48种以前的元素中一半参与了生物的活动,其中氧、碳、氢、氮、钾、钠、钙、镁、硫、磷和氯11种元素在人体内含量比例很大,也是人体内必需元素;铁、锌、铜、锰、铬、钴、钼、碘、氟、硒、钡、镍、硅、锡14种微量元素目前被认为是人体必需微量元素。微量元素各有各的特殊功
First, the human body essential elements Natural elements in the environment, almost all exist in the human body. Ninety-nine percent of the human living structure consists of most of the top 20 elements in the periodic table. Half of the 48 preceding elements in the Periodic Table are involved in biological activity, with a very high proportion of 11 elements of oxygen, carbon, hydrogen, nitrogen, potassium, sodium, calcium, magnesium, sulfur, phosphorus and chlorine in the human body , And is also an essential element in the human body. The 14 trace elements of iron, zinc, copper, manganese, chromium, cobalt, molybdenum, iodine, fluorine, selenium, barium, nickel, silicon and tin are currently considered as essential trace elements for the human body. Trace elements have their own special skills