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Left Atrium, a chamber which will push the Mitral Valve open. Blood then passes into the
Left Ventricle. Although it doesn't always look like it in drawings done from this angle, this is the largest and most important chamber in the heart. It pumps to the rest of the body. As it pumps, the pressure will close the mitral valve and open the aortic valve, with blood passing through to the
Path of blood through the heart
Figure 42.3 Generalized circulatory schemes of vertebrates