Mediastinum

Pericardium

Chambers of The Heart

Pathway of Blood Through the HeartDeoxygenated blood from the body returns to via the vena cava and enters the right atriumThe right atrium squeezes blood through the tricuspid valve into the right ventricleThe right ventricle pumps blood through the pulmonary valve to the lungs for oxygenation via the pulmonary arteryThe blood is carried from the lungs back to the left atrium via the pulmonary veinsThe left atrium pushes the oxygenated blood through the mitral (bicuspid) valve to the left ventricleThe left ventricle pumps blood through the aortic valve into the systemic circuit (to the body) via the aorta

Systole and Diastole

Animation