The most authoritative answer in 2024
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Zoe Walker——Studied at the University of Melbourne, Lives in Melbourne, Australia.
As a subject matter expert in cardiovascular anatomy, I can tell you that the valve which prevents the backflow of blood into the left ventricle of the heart is the mitral valve, also known as the bicuspid valve. This valve is located between the left atrium and the left ventricle and ensures that blood flows in one direction: from the atrium to the ventricle when the heart is in diastole (the relaxation phase), and prevents backflow when the heart is in systole (the contraction phase).
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Noah Baker——Works at Facebook, Lives in Menlo Park. Holds a degree in Psychology from University of California, Los Angeles (UCLA).
As the ventricles contract, the mitral valve prevents backflow of blood into the left atrium, and blood is driven through the aortic valve into the aorta, the major artery that supplies blood to the entire body. The aortic valve, like the pulmonary valve, has a semilunar shape.read more >>
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