parasympathetic part

例句：

1. 1.The parasympathetic nervous system plays a crucial role in regulating heart rate and breathing.
   副交感神经系统在调节心率和呼吸方面起着至关重要的作用。
2. 2. During the fight or flight response, the parasympathetic nervous system helps to slow down theheart rate and divert blood flow away from the muscles.
   在战斗或逃跑反应期间，副交感神经系统有助于减缓心率并将血液分流到肌肉之外。
3. 3.Researchers have discovered that certain foods can stimulate the parasympathetic nervous system, leading to relaxation and improved sleep quality.
   研究人员发现某些食物可以刺激副交感神经系统，导致放松和提高睡眠质量。