👉 The tend fluid, also known as the pericardial fluid, is a clear, colorless liquid that fills the space between the lungs (pleura) and the heart (pericardium). It serves a crucial role in lubricating these surfaces, allowing them to slide smoothly against each other during heartbeats and reducing friction. Additionally, the tend fluid acts as a cushion, protecting both organs from mechanical injury and helping to maintain their position within the chest cavity. Its composition is carefully balanced, with normal levels typically ranging from 0.1 to 0.5 milliliters per liter of blood, and any significant changes can indicate underlying cardiac or pulmonary conditions.
