不管你是长大了的好奇宝宝。还是长不大的“十万个为什么”,“人体大探索”系列节目都将成为你认识自己的好选择!鼻屎是什么?头发是怎么长出来的?人为什么会流血?这些问题,你是不是都困惑过?现在,你找到答案了吗?答案就在这里!
What’s sweat?
什么是汗水?
Your body works best when its temperature is about 37º Celsius. When your body gets hotter than that, your brain doesn't like it — it wants your body to stay cool. So the part of your brain that controls temperature, called the hypothalamus, sends a message to your body, telling it to sweat.
人体体温在37摄氏度时,身体各功能活动最佳。当体温超过这个温度时,大脑就不乐意了,它要让体温降下来。所以大脑中控制体温的部分下丘脑就会发出一个信号给身体,告诉它要排汗。
Then special glands in your skin called sweat glands start making sweat. Sweat is also known as perspiration, and it is made almost completely of water, with tiny amounts of other chemicals like ammonia, urea, salts, and sugar.
人体皮肤中有种特别的腺体叫汗腺,负责分泌汗液。汗液几乎全是由水组成,也含有微量的化学元素,包括氨、尿素、盐和糖。
The sweat leaves your skin through tiny holes called pores. When the sweat hits the air, the air makes it evaporate. As the sweat evaporates off your skin, you cool down.
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