The right coronary artery supplies the right side of the heart with oxygenated blood. It arises from the right aortic sinus, at the base of the aorta. Then it travels obliquely down towards the right in the atrioventricular groove, between the conus arteriosus of right atrium and the right auricle of right atrium.
When it reaches the right border of the heart, the right coronary artery gives off the right marginal branch, which descends towards the apex of heart and anastomoses with branches of the anterior interventricular artery. Having given off some branches to the right atrium and ventricle, it winds around to the postero-inferior surface of heart, or diaphragmatic side.
Before it reaches the middle of the diaphragmatic side, it sends the posterior interventricular branch, which descends to the apex of heart. Then it keeps running in the groove, giving off secondary branches that penetrate deeply into the myocardium.
Below, anterior view of heart, showing the left and right coronary artery
Below, posterior side of heart, exhibiting the circumflex artery (a branch of the left coronary) and the posterior interventricular branch of the right coronary artery.
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