The Right Heart

The right atrium receives blood from the systemic veins (the vena cava).

The right artrio-ventricular valve is the tricuspid valve. It prevents blood from flowing back into the atrium when the ventricle contracts.

The pulmonary valve (lime green valve in the right ventricle) is positioned where the pulmonary artery leaves the right ventricle. It prevents blood from flowing back into the ventricle when it is filling with blood from the atrium.

The right ventricle pumps blood to the lungs through the pulmonary arteries.