…The gill circulation, which requires particularly high pressure, and the role of the heart as a pump to deal with it are highlighted, and from this too, the close connection between the respiratory system and the heart is apparent. Thus, the first vertebrate fish heart is generally called the gill heart, and it begins with the sinus venosus where the blood flows from the liver and kidneys meet, continues with the atria and ventricles, and ends with the trunk of the artery that transitions into the blood vessels of the gills. The beginning part is called the portal vein, and the end part is called the portal vein. … *Some of the terminology that refers to the "gill heart" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…ここでは,とくに高圧を必要とするえらの循環と,それに対処するポンプとしての心臓の役割が浮彫にされ,ここからもまた呼吸器と心臓との密接な連関がうかがわれる。 こうして脊椎動物で最初につくられる魚の心臓は一般に〈えらの心臓〉と呼ばれることになるが,それは肝臓・腎臓の血流の落ち合う静脈洞に始まり,心房・心室と続き,動脈幹となってえらの血管に移行するところで終わる。始めの部分が静脈門,終りの部分が動脈門と呼ばれる。… ※「えらの心臓」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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