Arterial/ɑːrˈtɪriəl/ Definition 1 of 2Pro Tip 1/3Human Anatomy Used in medical or biological contexts referring to the human body's blood system. The arterial damage was severe, requiring surgery. Pro Tip 2/3Not Venous 'Arterial' specifically means related to arteries, not veins, which carry blood back to the heart. Arterial blockages can lead to heart attacks. Pro Tip 3/3Indicates Direction Implies the direction of blood flow away from the heart supplying oxygen. Arterial flow is critical for organ function.