静脉窦

例句：

1. 1. Blood flows through the venous system to the heart.
   血液通过静脉系统流向心脏。
2. 2. The doctor performed a venous catheterization on the patient.
   医生为病人进行了静脉导管插入术。
3. 3.The venous return of oxygenated blood is essential for the body's health.
   氧合血的静脉回流对身体健康至关重要。