Explain why ventricles have thicker walls than atria. Explain why the left ventricle has thicker walls than the right ventricle
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Their muscular walls are thicker than the atria because they have to pump blood out of the heart. ... This is because the left ventricle has to pump blood at a higher pressure so that it reaches all areas of the body (including the fingers and toes) but the right side only has to pump blood to the lungs.
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