Which artery connects heart to arm directly?

The coronary arteries are responsible for carrying oxygen-rich blood to the heart. However, most oxygen-rich blood is being carried away from the heart, meaning that most arteries are not carrying blood into the heart at all. Veins are responsible for carrying de-oxygenated blood towards the heart so that their oxygen supply can be replenished in the lungs.

The two veins which actually enter the heart are the superior vena cava or the precava which carries blood from the upper half of the body into the heart and the inferior vena cava(IVC), also known as the posterior vena cava, which carries blood from the lower half of the body into the heart.