More importantly, they can affect blood pressure as well, the strength of your heartbeat and the pressure that your heart generates.

尤为重要的是,这也会影响血压,心跳的强度,和心脏能够输出的压力

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As it does that it changes the volume of the heart and gives the - creates the pressure that moves blood around your body, so it has that muscular system.

这使心脏的体积发生变化,产生了足以使血液流遍全身的压力,这就是心脏中有肌肉系统的原因

耶鲁公开课 - 生物医学工程探索课程节选