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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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 -
which separates the atria from the ventricles.即将心室与心房分开的房室隔 -
The heart is kind of tilted to one side,心脏是向一侧倾斜的 -
it's not straight up and down,并不是垂直上下的