The aorta and its major branches are elastic arteries — they contain more elastin than any other blood vessel type, so they can absorb the large pressure fluctuations as blood leaves the heart.

主动脉及其主要分支是弹性动脉——它们比任何其他血管类型都含有更多的弹性蛋白，因此它们可以吸收血液离开心脏时的巨大压力波动。