The left ventricle is involved in the body circulation and is connected superiorly to the left atrium and inferiorly to the aorta. The right ventricle participates in the pulmonary circulation and is connected superiorly to the right atrium and inferiorly to the pulmonary artery. The anatomical difference between the two is that the inner wall of the left ventricle is smooth, while the inner wall of the right ventricle has a muscle called the constrictor cords or regulating bundles, which run from the interventricular septum to the root of the anterior papillary muscle in the anterior wall of the right ventricle. The wall of the right ventricle is thinner than the wall of the left ventricle, being about 1/3 the thickness of the left ventricle wall, and the right and left ventricles are separated by the interventricular septum. Normally, the left ventricle has a higher ejection fraction than the right ventricle. In a complete cardiac cycle, the left heart occupies a slightly longer period of time than the right heart. The right ventricle contains venous blood, which then flows into the left heart via the pulmonary circulation; the left ventricle receives arterial blood, which is then transported to the systemic vasculature via the body circulation.