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肝的血供来自()。

单选题
2021-12-28 02:00
A、肝动脉
B、肝静脉
C、肝门静脉
D、肝动脉和肝静脉
E、肝动脉和肝门静脉
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正确答案
E

试题解析
肝血流量约占心输出量的1/4。正常成人每分钟约接受1.5L来自肝动脉和肝门静脉的血液血供。供血量的25%~30%由氧饱和度为98%的肝动脉供给,70%~75%由氧饱和度为70%的肝门静脉供给,两股血流供应肝的氧量几乎相等。肝门静脉对维持肝脏的功能较肝动脉重要。

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