👉 A mandatory fluid, also known as essential fluids or vital fluids, refers to the body's fluids that are critical for maintaining normal physiological functions and cannot be completely replaced by dietary intake. These fluids include plasma (the liquid component of blood), serum, and interstitial fluid. They play essential roles in regulating body temperature, transporting nutrients, oxygen, and waste products, maintaining blood pressure, and facilitating cellular metabolism. The three main types of mandatory fluids are plasma, serum, and interstitial fluid, each contributing uniquely to the body's homeostasis.
