smooth muscle

例句：

1. 1. The smooth muscle inthe stomach relaxes when we eat.
   当我们吃东西时，胃中的平滑肌肉会放松。
2. 2. The smooth muscle in the walls ofthe arteries helps to control blood flow.
   动脉壁中的平滑肌肉有助于控制血流。
3. 3.The smooth muscle in the walls of theblood vessels is responsible for maintaining blood pressure.
   血管壁中的平滑肌肉负责维持血压。