1. A major blood vessel that is vital to the circulation system, carrying oxygenated blood from the heart to important organs and tissues
The coronary artery is a key artery that supplies blood to the heart muscle.
A artéria coronária é uma artéria principal que fornece sangue ao músculo cardíaco.
2. In a figurative sense, a crucial route, passage, or line of communication that is essential to the functioning of a system
Interstate 95 is a key artery for commerce along the East Coast.
A Rodovia I-95 é uma artéria principal para o comércio na Costa Leste.