Structure of the heart

• Atrioventricular valves separate the atrias and the ventricles
• The aorta leads out of the left ventricle
• The pulmonary vein leads into the left atrium
• The vena cava leads into the right atrium
• The pulmonary artery leads out of the right ventricle
• Semilunar valves are located in the pulmonary artery and the aorta to prevent the backflow of blood
• Systemic circulation provides blood to all parts of the body
• Right atrium receives deoxygenated blood which is pumped through the pulmonary circulation to the lungs to be oxygenated