皮肤是人体的第一道防线。虽然皮肤的厚度仅有3毫米,但却是人体上最大的组织,它像盔甲一样,将人体约2平方米的体表几乎全部覆盖,使脆弱的人体与外界环境隔离开来,免受机械损伤和有害物质的侵袭。随着科学技术的不断发展和完善,皮肤的功能进一步被认识,令人耳目一新。 Skin is the body’s first line of defense. Although the thickness of the skin is only 3 millimeters, but it is the largest body of the human body, it is the same as the armor, the human body about 2 square meters of body surface almost completely covered, so fragile body and the external environment isolated from the machinery Injury and the invasion of harmful substances. With the continuous development and improvement of science and technology, the function of the skin is further recognized and refreshing.