Structures of the Heart

Structures of the HeartValvesValves are structures that allow blood to flow through only one way (in one direction) when the heart contracts. They open when the heart contracts, and close when the heart relaxes.Tricuspid ValveValve that separates right atrium from right ventricle.When the atriums contract, it opens and blood is pushed through. When the ventricles contract, it closes and does not allow blood to flow through.Pulmonary ValveValve that separates the right ventricle and the pulmonary artery. Valve opens when the ventricles contract and closes when ventricles relax.Mitral ValveValve that separates left atrium from the left ventricle.When the atriums contract, it opens and blood is pushed through. When the ventricles contract, it closes and does not allow blood to flow through.

Aortic ValveValve that separates the left ventricle and the aorta. Valve opens when the ventricles contract and closes when ventricles relax.