…In parallel with the opening of the gill slits, gill arches develop along each gill slit. In fish that live their entire lives in water, numerous gill lamellae are arranged in two rows on the outer posterior side of the gill arches and function as respiratory organs. In cartilaginous fish, there are 5 to 7 pairs of gill slits, but the gill septum interposed between the two rows of gill lamellae on each gill arch extends long enough to reach the body surface, so each gill slit opens separately to the body surface through an external gill opening. … *Some of the terminology that mentions "gill lamella" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…鰓裂の開口と並行して,それぞれの鰓裂に沿って鰓弓gill archが発達する。一生を水中で暮らす魚類では,鰓弓の外後側に無数の鰓弁gill lamellaが2列に並び,呼吸器官として働く。軟骨魚類では鰓裂は5~7対あるが,各鰓弓に2列に並ぶ鰓弁の間に介在する鰓隔膜が長く延長して体表に達するため,各鰓裂は別々に外鰓孔によって体表へ開口する。… ※「gill lamella」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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