有趣的人体屏障文＼寻建为人在自然界中生活，与形形色色的病原体“混居”，不仅练就了一套抵御病菌入侵、保护身体健康的本领，而且营造了许许多多的屏障，保障着生命的延续。１皮肤皮肤是人体最大的屏障，它与外界环境直接接触，具有重要的保护作用，且能阻挡异物和细菌... Interesting body barrier text Search for people living in nature, and all kinds of pathogens “mixed”, not only trained to resist a germ invasion, protect the health of the ability, but also to create a lot of barriers to protect The continuation of life. 1 Skin Skin is the largest barrier to the human body, it is in direct contact with the external environment, has an important protective effect, and can block foreign matter and bacteria ...