large artery 大动脉
going to balloon out 可以膨胀
medium artery 中动脉
going to balloon out 可以膨胀
veins 静脉
trying to get blood out to the capillaries(毛细血管)
veins have deoxygenated blood 缺氧血
arteries 动脉
trying to get blood out to the capillaries
arteries have oxygented blood 富含氧
high-pressure system 高压系统
pulmonary vein 肺静脉
back to the heart with oxygen
enormous vein 大静脉
little valves 瓣膜
make sure that blood continues to flow in one direction
deal with large volumes 容纳大容量血流量
superior vena cava 上腔静脉
bringing back blood from the arms and head
pressure system and blood volume
oxygenated and deoxygenated(color 颜色)
high volume system(2/3) 大容量体系
high resistance(阻力) system
