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根据科学家的研究,目前认为组成人体的元素有50多种,约占自然界元素总数的一半左右。人体重量的99%是由碳、氢、氧、钾、钙、铁等12种元素所组成。属于金属元素的有14种,即钙、钾、钠、镁、铁、锌、铜、钒、锰、钼、铬、钴、锡等,钾、钠、钙、镁等四种元素要占人体中金属离子总量的99%以上。它们大多以络合物的形式存在于人体之中。这些元素在人体内的含量,往往与它们在土壤、水质、大气和食物中的含量有关。根据金属元素对人体健康的不同影响,可以把它们分成两大类:就是生命必需的金属元素和污染金属元素。
According to the research of scientists, there are currently over 50 kinds of elements that constitute the human body, accounting for about half of the total number of elements in nature. 99% of the human body weight is composed of carbon, hydrogen, oxygen, potassium, calcium, iron and other 12 kinds of elements. There are 14 kinds of metal elements, namely calcium, potassium, sodium, magnesium, iron, zinc, copper, vanadium, manganese, molybdenum, chromium, cobalt, tin, potassium, sodium, More than 99% of the total amount of metal ions. Mostly in the form of complexes exist in the body. The content of these elements in the human body, often with their content in the soil, water, the atmosphere and food. According to the different effects of metal elements on human health, they can be divided into two categories: metal elements that are essential to life and those that pollute the metal.