论文部分内容阅读
我们都知道,世界上的物质是无奇不有、品种繁杂的,但不管怎样,它们都不外是103种元素的化身,就连人也不例外。人体内不仅存在着金属,而且还起着重要的作用呢。人体内的钢铁运输兵铁是现代社会的重要物质基础,而铁在人体内也居有同样重要地位。人体中的铁仅仅只有几克重,可是如果谁失去了这为数很小的几克重的铁,那将危及人的生命。因为铁在人体内担负着光荣而重要的运输任务,缺少它的劳动,人的生命就会因缺氧而告终。人不能离开氧而生活,而氧是通过血液的循环,把它从肺部输送到人体的各个组织中去,然后,血液又把
We all know that the materials in the world are full of wonders and variety, but in any case, they are nothing but the incarnation of 103 elements. Even people are no exception. Not only does metal exist in the human body, but it also plays an important role. Iron transport in the human body is an important material foundation of modern society, and iron also plays an equally important role in the human body. The iron in the human body is only a few grams, but if anyone loses a few grams of iron, which is very small, it will endanger human life. Because iron carries the glorious and important transportation task in the human body and lacks its labor, human life will end with oxygen deficiency. People can’t live without oxygen. Oxygen is transported from the lungs to the tissues of the human body through the blood circulation, and then the blood is