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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 Archenteron ： ウィキペディア英語版 Archenteron The primitive gut that forms during gastrulation in the developing embryo is known as the archenteron or the digestive tube. It develops into the digestive tract of an animal. ==Formation of the Archenteron in Sea Urchins== :''See Gastrulation.'' As primary mesenchyme cells detach from the vegetal pole in the gastrula and enter the fluid filled cavity in the center (the blastocoel), the remaining cells at the vegetal pole flatten to form a vegetal plate. This buckles inwards towards the blastocoel in a process called invagination. The cells continue to be rearranged until the shallow dip formed by invagination transforms into a deeper, narrower pouch formed by the gastrula's endoderm. This narrowing and lengthening of the archenteron is driven by convergent extension. The open end of the archenteron is called the blastopore. The filopodia--thin fibers formed by the mesenchyme cells--found in a late gastrula contract to drag the tip of the archenteron across the blastocoel. The endoderm of the archenteron will fuse with the ectoderm of the blastocoel wall. At this point gastrulation is complete, and the gastrula has a functional digestive tube. 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「Archenteron」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.