Your heart's mitral valve does an awfully big job. Letting blood from the left atrium of the heart into the left ventricle without losing a drop is one of the toughest tasks in the circulatory system. In fact, if the system was suddenly opened at that point the force of the valve closing with send blood 5 feet into the air In this passage the author's purpose is to?

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1. Your heart's mitral valve does an awfully big job. Letting blood from the left atrium of the heart into the left ventricle without losing a drop is one of the toughest tasks in the circulatory system. In fact, if the system was suddenly opened at that point the force of the valve closing with send blood 5 feet into the air In this passage the author's purpose is to?