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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Intestinal epithelium ： ウィキペディア英語版 Intestinal epithelium The intestinal epithelium is the epithelium that covers the small and large intestine. It is simple columnar and nonciliated. ==Structure== The epithelium is part of the intestinal mucosa layer. In the small intestine this takes the form of villi but these are not present in the colon. In both parts of the mammalian intestine, the mucosa is covered by a single layer of epithelial cells that is renewed every 4–5 days. Proliferative cells (Stem Cells) reside in the crypts of Lieberkühn (epithelial invasions into the underlying connective tissue).〔 〕 New cells are formed in the crypts of Lieberkühn which then migrate upwards and upon reaching the tip of the villus undergo apoptosis, and are shed off into the intestinal lumen. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Intestinal epithelium」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.