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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 Physoclisti ： ウィキペディア英語版 Physoclisti Physoclisti are fishes that lack a connection between the gas bladder and the alimentary canal, the bladder serving only as a buoyancy organ. Addition and removal of the gases from the gas bladder in these fishes occurs through specialised structures called the gas gland and ovale respectively. The pneumatic duct that connects the gut and gas bladder is present in the embryos of these fish but it is lost during development. This anatomical state is believed to be derived from the ancestral physostomous state. Some fishes, such as eels, are anatomically physostomous, but their gas bladders function similar to those of physoclists. ==See also== * Physostome 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「Physoclisti」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.