Blood enters the heart from the body through the Inferior and Superior Venae Cavae into the Right Atrium.  It passes through the Tricuspid Valve into the Right Ventricle, then through the Pulmonic Valve into the Pulmonary Arteries.  From there, it goes into the lungs, where carbon dioxide is released and oxygen is picked up.  From the lungs, blood returns to the heart via the Pulmonary Veins and into the Left Atrium.  It then passes through the Bicuspid Valve (also known as the Mitral Valve) and into the Left Ventricle.  From there, it flows through the Aortic Valve, into the Aorta, and is distributed to all parts of the body.


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