venous absorption

例句：

1. 1.Blood flows through the venous system.
   血液通过静脉系统流动。
2. 2. The doctor used a needle to puncture the venous wall.
   医生用针穿透了静脉壁。
3. 3.Venous blood is rich in oxygen and nutrients.
   静脉血富含氧气和营养物质。