Venae atrioventriculares

例句：

1. 1.The heart's pumping action is essential for the proper functioning of the body.
   心脏的泵血作用对于身体的正常功能至关重要。
2. 2. During surgery, the surgeon must carefully control the flow of blood to prevent any damage to the patient's vital organs.
   在手术过程中，外科医生必须小心控制血液流动，以防止对患者的重要器官造成任何损害。
3. 3. The veins in the arm are responsible for carrying oxygenated blood back to the heart.
   手臂中的静脉负责将富含氧气的血液输送回心脏。