头发是皮肤附属结构之一,主要功能是对头颅起保护、保温作用。最近生物学家研究指出,头发的作用不仅如此,还有许多其他重要作用。其一,头发能积累微量元素。头发和人体其他组织一样,也在不断地进行着新陈代射,许多金属元素可由头发排泄。还可将代谢产物保留很长时间,其中微量元素的含量能反映出人接触微量元素的环境和体内相应元素的含量。所以,要想知道某地区是否存在对人体有害的元素,可以通过检查当地人的头发。例如汞是 Hair is one of the accessory structures of the skin. Its main function is to protect the head and keep warm. Biologists recently pointed out that the role of hair is not only that, there are many other important roles. First, hair can accumulate trace elements. Like other tissues in the human body, the hair is continuously undergoing new generations of injections, and many metallic elements can be excreted by the hair. The metabolites can also be retained for a long time, and the content of trace elements can reflect the human exposure to trace elements in the environment and the content of the corresponding elements in the body. Therefore, if you want to know whether there are harmful elements in an area, you can check the hair of the local people. For example, mercury is