inspiratory muscles

例句：

1. 1. The patient was unable to breathe properly, and the doctor had to intubate him.
   病人无法正常呼吸，医生不得不给他插管。
2. 2. The scientist discovered that the inspiratory muscles were responsible for the movement of air into the lungs.
   科学家发现，吸气肌肉负责将空气吸入肺部。
3. 3. During sleep, the diaphragm contracts to expand the chest cavity, which allows the inspiratory muscles to relax.
   在睡眠时，膈肌收缩以扩大胸腔，使吸气肌肉得以放松。