Front View (Anterior) of the Heart

Front View of the Heart

Outside View of the Back (Posterior) of the Heart

Coronary veins (in blue) - take oxygen-poor ("deoxygenated") blood that has already been "used" by muscles of the heart and returns it to the right atrium

Circumflex artery - supplies blood to the left atrium and the side and back of the left ventricle

Left coronary artery - divides into two branches (the circumflex artery and the left anterior descending artery)

Left anterior descending artery (LAD) - supplies blood to the front and bottom of the left ventricle and the front of the septum

Pulmonary veins - bring oxygen-rich blood back to the heart from the lungs

Right coronary artery (RCA) - supplies blood to the right atrium, right ventricle, bottom portion of the left ventricle and back of the septum

Outside View of the Back (Posterior) of the Heart)