Vortex cordis

例句：

1. 1. The vortex cordis is a complex structure in the heart that controls blood flow.
   涡旋状心脏是心脏中控制血流的复杂结构。
2. 2. The patient's condition worsened, and she was rushed to the operating room for emergency surgery.
   患者的病情恶化，被紧急送往手术室进行手术。
3. 3.The doctor explained the procedure to the patient, who was nervous but willing to undergo the treatment.
   医生向患者解释了手术过程，患者虽然紧张但愿意接受治疗。