The aorta is a large blood vessel that carries blood from the heart to the whole body.
main artery; vital route
Figurative use for a crucial transportation or communication route, like a major highway or rail line.
この高速道路は日本の経済の大動脈だ。
This expressway is a vital artery of Japan's economy.
The Shinkansen is Japan's main artery.
His aorta ruptured and he underwent emergency surgery.
During the operation, they made an incision in the aorta and attached an artificial vessel.
aortic dissection
thoracic aorta