👉 The committed fluid, also known as the collapsible fluid or interstitial fluid, is a component of the body's fluid system that exists between cells and within the spaces between tissues. Unlike plasma, which is the liquid component of blood, the committed fluid is tightly bound to cells and tissues, meaning it cannot freely move in or out of these spaces. This fluid plays a crucial role in maintaining tissue hydration, nutrient exchange, and waste removal. The volume of committed fluid is tightly regulated by the balance between hydrostatic pressure (which pushes fluid out of cells) and oncotic pressure (which pulls fluid back into cells), ensuring that tissues remain adequately hydrated without excessive fluid accumulation or depletion.
