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同学们,你知道吗?在你的外形美当中,皮肤具有何等重要的地位!尤其是面部皮肤,更让人注目。皮肤和人的肌体有着密切的联系,是人体中最大的器官。成年人的皮肤面积约有1.5-2平方米,大约占人体体重的15％,成年人皮肤厚度约2毫米,但臀部、手掌、脚掌的皮肤厚度则为3-4毫米。皮肤含有丰富的血管网,可容纳人体血液总量的五分之一。如果皮肤红润而有光泽,说明你血液循环丰富保证了皮肤的营养供应。如果你皮肤苍白无华则说
Students, do you know what is the most important aspect of the skin in your beauty? Especially the facial skin is even more noticeable. The skin is closely related to the human body and is the largest organ in the human body. Adults have a skin area of about 1.5 to 2 square meters, which is about 15% of the human body weight. Adult skin thickness is about 2 millimeters, but the skin thickness of the buttocks, palms, and soles is 3-4 mm. The skin contains a rich network of blood vessels that can hold up to one-fifth of human blood. If the skin is ruddy and shiny, it means your rich blood circulation guarantees the skin’s nutrient supply. If you have a pale skin