why is wall present in the heart
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I think it's answer is pericardium wall
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The heart's outer wall consists of three layers. The outermost wall layer, or epicardium, is the inner wall of the pericardium. The middle layer, or myocardium, contains the muscle that contracts. The inner layer, or endocardium, is the lining that contacts the blood.
if these walls are not present then how heart work proprly
if these walls are not present then how heart work proprly
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