来自《耶鲁大学开放课程：生物医学工程探索 第5集 第5集》

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  When you get a wound several things start to happen.
  受伤时有好几个生理过程会发生
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  First, hopefully your blood clots and so
  首先 顺利的话血液会形成凝块
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  that stops you from dying from loss of blood there,
  使你不至于流血而死
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  but your body tries to heal this wound that's created.
  进而身体尝试着去愈合创口
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  One of the first steps in that healing is that
  愈合的第一步是
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  fibroblasts like this cell crawl into the space
  成纤维细胞向
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  that's created by the wound
  损伤的创口爬行
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  and they grab a hold of both sides of the wound
  紧紧地抓住创口的两侧
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  and contract and try to pull it together.
  通过收缩回拉 试着使创口合拢
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  To do that they have to be able to stretch out
  为此 成纤维细胞必须能够伸展
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  and they have to be able to pull.
  和回拉
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  If you look at this picture of this fibroblast
  看了这张成纤维细胞的图片