cardiac vagus nerve

例句：

1. 1.The heart is the primary organ responsible for circulating blood throughout the body.
   心脏是负责在整个身体中循环血液的主要器官。
2. 2.Cardiologists specialize in treating heart diseases.
   心脏病学家专门治疗心脏病。
3. 3. The patient's heart rate was elevated during the test.
   在测试期间，患者的心率升高了。