👉 Protein Fluid (PF) is a colloidal fluid within biological tissues that consists of water and dissolved proteins, primarily albumin, globulins, and fibrinogen. Unlike the interstitial fluid, which is found outside cells, PF resides within the extracellular space between cells and cell membranes. This fluid plays a crucial role in maintaining tissue homeostasis by facilitating the transport of nutrients, waste products, and signaling molecules. It also contributes to the structural integrity of tissues by providing a medium for cell-cell interactions and maintaining the tissue's overall elasticity. The unique properties of PF, such as its low viscosity and high permeability, allow for efficient diffusion of substances, making it essential for various physiological processes including immune response, blood clotting, and metabolic regulation.
