👉 The crest fluid, also known as pericardial fluid, is a clear, colorless substance that lubricates the space between the heart and its surrounding pericardium, a double-layered sac that surrounds the heart. This fluid is produced by the mesothelial cells lining the pericardial cavity and helps reduce friction during heartbeats, allowing the heart to move smoothly within its chest cavity. The normal range for crest fluid is typically between 20 and 50 milliliters per liter, though variations can occur. Abnormalities in its volume or composition may indicate underlying heart conditions.
