<P> Coronary arteries supply blood to the myocardium and other components of the heart . Two coronary arteries originate from the left side of the heart at the beginning ( root ) of the aorta , just after the aorta exits the left ventricle . There are three aortic sinuses ( dilations ) in the wall of the aorta just superior to the aortic semilunar valve . Two of these , the left posterior aortic sinus and anterior aortic sinus , give rise to the left and right coronary arteries , respectively . The third sinus , the right posterior aortic sinus , typically does not give rise to a vessel . Coronary vessel branches that remain on the surface of the artery and follow the sulci of the heart are called epicardial coronary arteries . </P>
<P> Coronary arteries supply blood to the myocardium and other components of the heart . Two coronary arteries originate from the left side of the heart at the beginning ( root ) of the aorta , just after the aorta exits the left ventricle . There are three aortic sinuses ( dilations ) in the wall of the aorta just superior to the aortic semilunar valve . Two of these , the left posterior aortic sinus and anterior aortic sinus , give rise to the left and right coronary arteries , respectively . The third sinus , the right posterior aortic sinus , typically does not give rise to a vessel . Coronary vessel branches that remain on the surface of the artery and follow the sulci of the heart are called epicardial coronary arteries . </P>
how many coronary arteries are coming off of the root of the aorta
how many coronary arteries are coming off of the root of the aorta
Two
Two