venous skin flap

例句：

1. 1. The venous blood flows from the heart tothe lungs.
   静脉血从心脏流向肺部。
2. 2. Blood vessels are essential for carrying oxygenand nutrients throughout the body.
   血管对于输送氧气和营养物质到全身至关重要。
3. 3. The doctorperformed a venous catheterization on the patient.
   医生为病人进行了静脉插管。