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nuchal organ : ウィキペディア英語版 | nuchal organ
The nuchal organ is a ciliated pit or groove present at the posterior end of the prostomium of annelid worms,〔 some cephalopods,〔 and other invertebrates. Annelids only possess one nuchal organ, although the nature of the grooving may make it appear to be a pair of organs. It may be involved in light detection, and may have a role on food detection and mating. ==References==
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「nuchal organ」の詳細全文を読む
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