爪

爪（Claw），又称爪子或钩爪，是羊膜动物（哺乳类、鸟类及爬虫类）于手指及脚趾末端的表皮角质层附加物。

  中文部首，请见「爪部」。

参考资料
  • Maddin & al. (2009): The anatomy and development of the claws ofXenopus laevis (Lissamphibia: Anura) reveal alternate pathways of structural evolution in the integument of tetrapods. Journal of Anatomy, no 214 (4): pp 607-19 Abstract （页面存档备份，存于）
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