鰓呼吸

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魚類主要的呼吸方式.進行呼吸的部位主要在鰓片（硬骨魚為鰓絲）支持的鰓小片上，鰓小片由單層上皮細胞、支持細胞和毛細血管組成.水流通過鰓小片時，毛細血管中紅血細胞攜帶的ＣＯ２能充分同水中的Ｏ２進行交換.鰓上的血液循環是鰓呼吸的保障.入鰓動脈將含ＣＯ２多的血液輸入鰓間隔，在鰓間隔上分兩支進入每個半鰓，每支發出若干細支進入鰓片，每細支的鰓小片上形成毛細血管網.氣體交換後攜帶著多Ｏ２血，由逐步匯合成的出鰓動脈血管輸出鰓，再運送至各組織器官.鰓的運動是鰓呼吸的必需條件，它使水沿著一定途徑流動，鰓隔（軟骨魚）和鰓蓋（硬骨魚）的啟開，猶如泵的作用，將水從口腔中抽出.口瓣膜關閉，防水倒流，使水始終保持從口進入經鰓裂流出的流動方向.相 關 詞 條:魚類 |脊椎動物 |兩棲綱 |魚 |肺魚 |動物 |蜻蜓 |動物組織 |呼吸器官 |GOOGLE英文翻譯:Fish the main breathing patterns. To breathe the site mainly in the gills tablets (bony fish gill filaments) support the gills of a small chip, small piece of gill epithelial cells from the monolayer, composed of Sertoli cells and capillaries. Water through the gills of small films, capillaries in the red blood cells carry CO2 can be fully exchanged with water to O2. gill blood circulation on the gill respiratory protection. into the branchial artery to enter the blood with CO2 and more gill spacing, in the gills into the two sub-intervals of each one and a half gills, each issued a number of fine branches into the gill pieces, each small branch small piece of gill capillary network formed. After the gas exchange more O2 carrying blood from the gradually merge into the output of a gill gill arteries, and then transported to the various tissues and organs. gill movement is a necessary condition of the gill breathing, it makes the water flow along a certain way, gill septum (cartilaginous fish) and gill cover (bony fish) is being opened, as if pumping the role of the water from the mouth out. mouth off valves, water back, so always keep the water from the mouth into the flow through the gill slits of the flow direction. Related term: fish | invertebrates | Amphibia | fish | lungfish | Animals | Dragonfly | animal tissue | breathe Organ |