👉 Pa fluid, also known as pleural fluid, is a clear, colorless liquid that exists within the space between the lungs and the chest wall, known as the pleural cavity. It plays a crucial role in facilitating smooth lung expansion and contraction during breathing; it acts as a lubricant, reducing friction between the lungs and the surrounding tissues. Pa fluid also helps maintain the negative pressure within the pleural cavity, which is essential for keeping the lungs inflated. This fluid is constantly being produced by the mesothelial cells lining the pleural surfaces and is absorbed by the capillaries in the visceral pleura, maintaining a delicate balance that ensures efficient respiratory function.
