External section - external section

Japanese: 外節 - がいせつ
External section - external section

… The parts of animal visual cells that are stimulated by light have a special structure. The parts of vertebrate visual cells that receive light stimuli are called outer segments, which are made up of overlapping membranes on which photosensitive pigments are arranged. Outer segments are modified cilia. …

*Some of the terminology explanations that mention "outer segments" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

… 動物の視細胞visual cellは光で刺激される部分が特別な構造をしている。脊椎動物の視細胞の光刺激を受容する部分は外節と呼ばれ,膜が重なり合った構造になっていて,この膜に感光色素が配列している。外節は繊毛の変形したものである。…

※「外節」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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