discal vein

例句：

1. 1. Blood vessels are the main channels through which blood is transported throughout the body.
   血管是血液在身体内运输的主要通道。
2. 2. The heart's discal veins carry oxygenated blood to the lungs for oxygen exchange.
   心脏的静脉将含氧血液输送到肺部进行氧气交换。
3. 3. The discal veins in the brain are responsible for carrying waste products away from the brain.
   大脑中的静脉负责将废物从大脑中带走。