| 释义 |
sinoatrial noden.（名词）- 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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