en·do·derm /ˈɛndəˌdɚ/
  內胚葉,內皮層
  en·do·derm /ˈɛndəˌdɝm/ 名詞
  內胚層
  En·do·derm n.  Biol. (a) The inner layer of the skin or integument of an animal. (b) The innermost layer of the blastoderm and the structures derived from it; the hypoblast; the entoblast. See Illust. of Ectoderm.
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  endoderm
       n : the inner germ layer that develops into the lining of the
           digestive and respiratory systems [syn: entoderm, endoblast,
            entoblast, hypoblast]