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词汇 sinoatrial node
释义 sinoatrial noden.(名词)
  1. A small mass of specialized cardiac muscle fibers located in the posterior wall of the right atrium of the heart that acts as a pacemaker by generating at regular intervals the electric impulses of the heartbeat. Also called sinoauricular node ,sinus node 窦房结:位于右心房后壁的一小块特殊的心肌纤维,作为起搏器以正常的间隙引起心脏的电脉冲 也作 sinoauricular node,sinus node
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