tracheal muscle

例句：

1. 1.The tracheal muscle is responsible for the movement of air through the lungs.
   气管肌肉负责将空气通过肺部移动。
2. 2. The tracheal muscle is a vital part of the respiratory system.
   气管肌肉是呼吸系统的重要组成部分。
3. 3. During sleep, the tracheal muscle relaxes to allow for easier breathing.
   在睡眠时，气管肌肉放松以便于呼吸。