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Q.
The pericardial fluid is a protective fluid found between the two layers of the
NTA AbhyasNTA Abhyas 2020Body Fluids and Circulation
Solution:
The pericardium is a double-walled structure .About $20-30 \, ml$ in volume, this serous fluid acts as a lubricant and minimizes friction between the epicardium and parietal layer as the heart.