Between you and the rest of the world lies an interface that makes up 16% of your physical weight. This is your skin, the largest organ in your body: laid out flat, it would cover close to 1.7 square metres of ground. But besides keeping your organs in, what is its purpose?

在你和世界其他地方之间有一个占你身体重量16%的界面。这就是你的皮肤，你身体中最大的器官：平铺开来，它将覆盖近1.7平方米的地面。但是，除了把你的器官放在里面，它的作用是什么呢？