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杨茂全

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动物的循环系统由心脏和血管2部分组成。人的心脏由左心室、右心室、左心房和右心房构成。左心室发出主动脉,输送含氧多的血液到全身各处的器官,与器官的细胞进行气体交换;血液中的氧气扩散入细胞内供细胞生物氧化,细胞代谢过程中产生的二氧化碳扩散入血液使其转变为含二氧化碳多的静脉血。这些静脉血分别经下腔静脉和上腔静脉返回到右心房,再进入右心室。右心室发出肺动脉,输送含二氧化碳多的血液到肺部与肺泡中的气体进行交换,呼出二氧化碳,吸进新鲜氧气,使含二氧化碳多的静脉血转变成含氧多的动脉血。这些含氧多的动脉血经肺静脉返回到左心房,再进入左心室。这种循环模式称为完全双循环,人、哺乳动物和鸟类的血液循环途径具有相同的模式。
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zerohead

禁虫 (职业作家)

杨茂全(金币+2, 翻译EPI+1): 2010-07-19 00:42:40
动物的循环系统由心脏和血管2部分组成。人的心脏由左心室、右心室、左心房和右心房构成。

The circulatory system of animal is composed of heart and blood vessels. A human heart consists of several parts which are left ventricle, right left ventricle, left atria, and right atria.





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[ Last edited by zerohead on 2010-7-18 at 22:24 ]
2楼2010-07-18 22:00:04
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zerohead

禁虫 (职业作家)

杨茂全(金币+1): 2010-07-21 08:52:14
左心室发出主动脉,输送含氧多的血液到全身各处的器官,与器官的细胞进行气体交换;

The left ventricle pumps the blood through aorta, the body's main artery. The blood with high oxygen content is delivered to different organs around the body, at which gas exchange is performed between the blood and the tissues.
3楼2010-07-19 01:00:15
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izhangxing

新虫 (正式写手)

杨茂全(金币+2): 2010-07-21 08:52:09
Animal circulatory system is composed of Cardiac and Vascular 2 points. The human heart from the left ventricular and right ventricular and left and right atrium structure. Left ventricular the issue of aorta and transportation oxygenated blood to body organs, gas exchange with organ cells and blood oxygen diffusion into cells for Cell Biology oxidation and metabolism of the cells during proliferation of carbon dioxide to make it into the blood of venous blood carbon dioxide. The blood respectively by the inferior vena cava and superior vena cava return to the right atrium and re - enter the right ventricle. Right ventricular issue of pulmonary artery, conveying of carbon dioxide blood to the lungs and pulmonary gas exchange, exhale carbon dioxide, and breathe in fresh oxygen and blood carbon dioxide into oxygen blood. The oxygen of blood pulmonary venous return to the left atrium and into the left ventricle. Complete double circulation of this cycle model called, and blood circulation channels of mammals and birds has the same pattern.
4楼2010-07-20 16:09:42
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