来自《耶鲁大学开放课程：生物医学工程探索 第15集 第15集》
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the left atrium,左心房 -
the right ventricle,右心室 -
the right atrium,右心房 -
and there's this pathway.这是传导途径 -
The heart has something like a nervous system心脏上有个像神经系统一样的东西 -
in that this black region here is a pathway就是这些黑色的区域 -- 传导途径 -
that's called the cardiac conduction system.就是所谓的心脏传导系统 -
It consists of several important points.它包括了几个重要的点 -
The first is called the sinoatrial node or SA node第一个点称为窦房结或SA结 -
and it's in the right atrium.它位于右心房 -
The next point is the atrial ventricular node第二个点是房室结 -
which sits on a fibrous substance called the septum位于纤维间隔中