Unformatted text preview: endocardium is too thick for effective diffusion (and only the left side of the heart contains oxygenated blood). Instead, the following two arteries that arise from the aorta and encircle the heart in the artioventricular groove provide this function: • The left coronary artery has the following two branches: the anterior interventricular artery (left anterior descending, or LAD, artery) and the circumflex artery. The right coronary artery has the following two branches: the posterior interventricular artery and the marginal artery. Blood from the coronary circulation returns to the right atrium by way of an enlarged blood vessel, the coronary sinus. Three veins, the great cardiac vein, the middle cardiac vein, and the small cardiac vein, feed the coronary sinus....
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- Spring '10
- left coronary artery, right coronary artery