The aortic valve is located between the left ventricle and the aorta.The mitral valve is between the left atrium and the left ventricle.The pulmonary valve is between the right ventricle and the pulmonary artery.The tricuspid valve is between the right atrium and the right ventricle.On the left side, the left atrium and ventricle combine to pump oxygenated blood to the body. On the right side of the heart, the right atrium and ventricle work to pump oxygen-poor blood to the lungs.
Muscular walls, called septa or septum, divide the heart into two sides. The upper two chambers are called atria (singular: atrium) and the lower two are known as ventricles (singular: ventricle). Heart Chambers, Valves, Vessels, Wall and Conduction System
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