Superior and Inferior vena cavas → Right atrium → tricuspid valve → Right ventricle → pulmonary valve → pulmonary artery → lungs → pulmonary veins → left atrium → mitral valve → left ventricle → aortic valve → aorta → systemic circulation.

Superior and Inferior vena cavas → Right atrium → mitral valve → Right ventricle → pulmonary valve → pulmonary artery → lungs → pulmonary veins → left atrium → tricuspid valve → left ventricle → aortic valve → aorta → systemic circulation.

Superior and Inferior vena cavas → Right atrium → tricuspid valve → Right ventricle → pulmonary valve → pulmonary veins→ lungs → pulmonary artery → left atrium → mitral valve → left ventricle → aortic valve → aorta → systemic circulation.

Superior and Inferior vena cavas → Right atrium → tricuspid valve → Right ventricle → aortic valve → pulmonary veins→ lungs → pulmonary artery → left atrium → mitral valve → left ventricle → pulmonary valve → aorta → systemic circulation