Heart 1 Superior Vena Cava Inferior Vena Cava 2 Right Atrium 3 Oxygen poor blood 2 Right Atrium 3 Tricuspid Valve Rt Lung Lt Lung 2) Right Atrium 3) Tricuspid Valve Oxygen poor blood 1) Inferior Vena Cava 1

Heart 1 Superior Vena Cava Inferior Vena Cava 2 Right Atrium 3 Oxygen poor blood 2 Right Atrium 3 Tricuspid Valve 4 Right Ventricle Rt Lung Lt Lung 5 Pulmonary Valve 5) Pulmonary Valve 2) Right Atrium 3) Tricuspid Valve 4) Right Ventricle Oxygen poor blood 1) Inferior Vena Cava 2

Heart 1 Superior Vena Cava Inferior Vena Cava 2 Right Atrium 3 Oxygen poor blood 2 Right Atrium 3 Tricuspid Valve Oxygen poor blood 4 Right Ventricle 7) Rt Lung 7) Lt Lung 5 Pulmonary Valve 6 Pulmonary Artery 7 Lung 6) Pulmonary Artery Oxygen rich blood Oxygen rich blood 5) Pulmonary Valve 2) Right Atrium 3) Tricuspid Valve 4) Right Ventricle Oxygen poor blood 1) Inferior Vena Cava 3

Heart 1 Superior Vena Cava Inferior Vena Cava 2 Right Atrium 3 Oxygen poor blood 2 Right Atrium 3 Tricuspid Valve Oxygen poor blood 4 Right Ventricle 7) Rt Lung 7) Lt Lung 5 Pulmonary Valve 6 Pulmonary Artery 7 Lung 8 Pulmonary Vain 6) Pulmonary Artery 8) Pulmonary Vain 8) Pulmonary Vain 9 Left Atrium 10 Mitral Valve 9) Left Atrium Oxygen rich blood Oxygen rich blood 5) Pulmonary Valve 2) Right Atrium 10) Mitral Valve 3) Tricuspid Valve 4) Right Ventricle Oxygen poor blood 1) Inferior Vena Cava 4

Heart 1 Superior Vena Cava Inferior Vena Cava 2 Right Atrium 3 Oxygen poor blood 2 Right Atrium 3 Tricuspid Valve Oxygen poor blood 4 Right Ventricle 7) Rt Lung 7) Lt Lung 5 Pulmonary Valve 13 Aorta 6 Pulmonary Artery 7 Lung 8 Pulmonary Vain 6) Pulmonary Artery 8) Pulmonary Vain 8) Pulmonary Vain 9 Left Atrium 10 Mitral Valve 9) Left Atrium 11 Left Ventricle 12 Aortic Valve Oxygen rich blood Oxygen rich blood 13 Aorta 5) Pulmonary Valve 2) Right Atrium 10) Mitral Valve 12) Aortic Valve 3) Tricuspid Valve 11) Left Ventricle 4) Right Ventricle Oxygen poor blood 1) Inferior Vena Cava 5