Where is the pericardial fluid secreted from?

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(D) The heart is enclosed by a double-walled membranous bag called the pericardium,which contains the pericardial fluid.This fluid is secreted by the

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Pericardium

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(D) The heart is enclosed by a double-walled membranous bag called the pericardium,which contains the pericardial fluid.This fluid is secreted by the serous layer of the pericardium,specifically the inner visceral layer (epicardium) and the outer parietal layer.Its primary function is to reduce friction between the heart walls and the surrounding tissues during the contraction and relaxation of the heart.

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