👉 The bound fluid refers to the portion of a fluid that is physically confined within the walls or surfaces of a body, such as blood cells in blood vessels or proteins and other macromolecules in the extracellular matrix. Unlike free fluid, which can move freely throughout a volume, bound fluid is restricted in its movement due to these confining structures. This restriction impacts the fluid's behavior, such as its viscosity and how it interacts with the body's tissues, playing a crucial role in various physiological processes including circulation, nutrient transport, and waste removal.
