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指甲是人指端背面扁平的甲状结构,属于结缔组织。指甲不但能增强抓握力、护养指尖端,而且有着烘衬美容、药用、窥视健康的作用。指甲的生长人的指甲平均每月生长5~12毫米。指甲早晨比下午长得快,白天比黑夜长得快,夏天比冬天长得快。手指越长,指甲长得越快。因此人的中指指甲长得最快,手指甲比脚趾甲长得快四倍。指甲一旦脱落,其裸露部分就被一种颗粒状的组织覆盖,然后长出新表皮层,长出新指甲的时间约需100~160天。习惯用
Nails are finger-shaped back of the back of a flat structure, belonging to connective tissue. Nails can not only enhance the grip, nursing fingertips, but also bake beauty, medicinal, peep health role. The growth of nails man’s average monthly growth of 5 to 12 mm. Nails grow faster in the morning than in the afternoon, grow faster in the day than in the night, and grow faster in the summer than in the winter. The longer fingers, the faster nails grow. Therefore, the fastest middle finger nails, fingernails grow four times faster than the toenails. Once the nails fall off, their bare parts are covered with a granular structure and grow a new epidermis layer. The time to grow new nails is about 100 to 160 days. Used to