脉管

例句：

1. 1.The heart's blood vessels are responsiblefor delivering oxygenated blood to the body.
   心脏的血管负责将氧气丰富的血液输送到身体。
2. 2. Blood vessels in the skinare responsible for transporting nutrients and removingwaste products.
   皮肤中的血管负责运输营养物质和排除废物。
3. 3. The circulatorysystem is responsible for the movement of bloodthroughout the body.
   循环系统负责整个身体的血液流动。