Artery

Also known as the artery or pulse vein, are vessels that lead the blood flow away from the heart.

Larger arteries are composed of three layers:

• the intima as the inner lining of the epithelium,

• the smooth muscle-elastic Media and

• the connective tissue externa or adventitia.

Large arteries have their own vascular supply (vasa vasorum). The arteries of the body circulation carry light red arterial blood; those of the lung circulation (pulmonary circulation) carry dark red venous blood.

https://en.wikipedia.org/wiki/Artery