Not surprisingly, the differences between skeletal and cardiac muscle tissues are key to understanding their functions.

毫不奇怪，骨骼和心肌组织之间的差异是理解它们功能的关键。

Unlike the skeletal muscles, the body's cardiac and smooth muscles are managed by the autonomic nervous system beyond our direct control.

与骨骼肌不同，身体的心肌和平滑肌是由自动神经系统控制，而非听从我们的直接控制。

Your autonomic system is the branch of your peripheral nervous system that regulates the functions of your internal organs, like your heart and stomach, and also controls your smooth and cardiac muscles, and your glands.

你的自主神经系统是你周围神经系统的分支，它调节你内部器官的功能，比如你的心脏和胃，也控制你的平滑肌和心肌，以及你的腺体。