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从头顶到脚底,你的再生能力真的很惊人。毛发你的头发年龄从0岁到6岁或7岁的都有。你的头发每天会长0.5毫米。你的体毛每天会长大约0.27毫米。你的眉毛每64天更新一次。大脑你的大脑皮质细胞不会更新,它们和你的年龄一样大。但有证据表明,大脑的海马区会持续更新。眼睛眼角膜表面覆盖着一层薄薄的细胞,它们持续更新,全部翻新一次需时7~10天。虹膜细胞不会更新,这是人老了视力会出问题的原因。然而,干细胞疗法正开始瞄准退化的虹膜。科学家已经能让视杆细胞(捕捉弱光的光受体)更新,不过目前尚限于试管中。
From the top to the bottom of your foot, your regenerative ability is really amazing. Hair Your hair is from 0 years old to 6 years old or 7 years old. Your hair grows 0.5 millimeters a day. Your body hair grows about 0.27 millimeters a day. Your eyebrows are updated every 64 days. Your brain cortex cells are not updated, they are as old as yours. But there is evidence that the brain’s hippocampus will continue to update. Eye cornea surface covered with a thin layer of cells, they continue to update, all refurbished takes 7 to 10 days. Iris cells will not be updated, which is the cause of the old vision problems. However, stem cell therapies are beginning to target degraded irises. Scientists have been able to update rod cells, which capture weak light receptors, but are still limited to tubes.