Circulatory system/ja: Difference between revisions

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[[File:Two chamber heart.svg|thumb|left|二室に分かれた魚の心臓]]

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~~The circulatory systems of all vertebrates, as well as of~~ [[~~annelid~~]]~~s (for example,~~ [[~~earthworm~~]]~~s) and~~ [[~~cephalopod~~]]~~s (~~[[~~squid~~]]s, [[~~octopus~~]]~~es and relatives) always keep their circulating blood enclosed within heart chambers or blood vessels and are classified as ''closed'', just as in humans. Still, the systems of~~ [[~~fish~~]], [[~~amphibian~~]]s, [[~~reptile~~]]~~s, and~~ [[~~bird~~]]~~s show various stages of the [[evolution]] of the circulatory system. Closed systems permit blood to be directed to the organs that require it.~~

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魚類では、血液は[[:ja:エラ|エラ]]の毛細血管を通って体組織の毛細血管に送られる。これは単一循環として知られている。したがって、魚の心臓は（2つの部屋からなる）''単一のポンプ''でしかない。

~~In fish, the system has only one circuit, with the blood being pumped through the capillaries of the~~ [[~~gill~~]]~~s and on to the capillaries of the body tissues. This is known as~~ ''~~single cycle~~'' ~~circulation. The heart of fish is, therefore, only a single pump (consisting of two chambers).~~

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 [[File:Two chamber heart.svg|thumb|left|二室に分かれた魚の心臓]]
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+すべての脊椎動物、[[:ja:環形動物|環形動物]]（たとえば[[:ja:ミミズ|ミミズ]]）、頭足類（[[:ja:イカ|イカ]]、[[:ja:タコ|タコ]]、およびその近縁種）の循環体は、循環血液を常に心室や血管内に封じ込め、人間と同じように閉鎖系に分類される。それでも、[[:ja:魚類|魚類]]、[[:ja:両生類|両生類]]、[[:ja:爬虫類|爬虫類]]、[[:ja:鳥類|鳥類]]のシステムは、循環系の[[:ja:進化|進化]]のさまざまな段階を示している。閉鎖系は、血液を必要とする臓器に血液を送ることができる。
-The circulatory systems of all vertebrates, as well as of [[annelid]]s (for example, [[earthworm]]s) and [[cephalopod]]s ([[squid]]s, [[octopus]]es and relatives) always keep their circulating blood enclosed within heart chambers or blood vessels and are classified as ''closed'', just as in humans. Still, the systems of [[fish]], [[amphibian]]s, [[reptile]]s, and [[bird]]s show various stages of the [[evolution]] of the circulatory system. Closed systems permit blood to be directed to the organs that require it.
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+魚類では、血液は[[:ja:エラ|エラ]]の毛細血管を通って体組織の毛細血管に送られる。これは単一循環として知られている。したがって、魚の心臓は（2つの部屋からなる）''単一のポンプ''でしかない。
-In fish, the system has only one circuit, with the blood being pumped through the capillaries of the [[gill]]s and on to the capillaries of the body tissues. This is known as ''single cycle'' circulation. The heart of fish is, therefore, only a single pump (consisting of two chambers).
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