👉 The PB Fluid, or Plasma Membrane Fluid, is a dynamic mixture of lipids, proteins, and other small molecules that permeate the cell membrane, primarily composed of phospholipids, cholesterol, and various proteins. This fluid mosaic structure allows for the free movement of these components, facilitating essential cellular processes such as signal transduction, transport of molecules, and cell-to-cell communication. The fluidity of the PB Fluid is crucial for maintaining membrane flexibility, enabling proteins to function properly, and supporting the overall health and functionality of the cell.