天气预报 > 其他 > 鱼总是不停的游是为什么
鱼总是不停的游是为什么
更新时间: 2020-10-06 00:00:00  

大部份的鱼类都是用鳃呼吸。鱼会用嘴巴将水吸入,水流经鳃部,再从鳃盖后面的开口流出。由於水分中含有氧气,鱼类可利用它来清洁血液,就像人类从空气中吸取氧气将血液净化的情况一样。游动是为了令水流经鳃部 ,利用水中氧气来清洁血液。

关键词: 总是 不停 为什么

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