Left and right ventricles are the two lower chambers of the heart. The left develops more pressure to pump blood to the aorta, and the right develops a lower pressure. The wall on the left is thinner and oval, and the right is triangular.
The left pumps blood into the aorta, and the right ventricle pumps blood into the pulmonary artery. The left carries oxygenated blood, and the right carries deoxygenated blood. The left belongs to systematic circulation, and the right belongs to pulmonary circulation.