👉 The estimated fluid in the body, often referred to as total body water (TBW), is a critical component that encompasses all the water present in various compartments. This includes intracellular fluid (ICF) within cells, which makes up about 20% of TBW, and extracellular fluid (ECF), which is further divided into interstitial fluid (ISF) and plasma. The ECF is estimated to be approximately 20% of TBW, with the remaining 80% primarily in the form of water within blood plasma. This fluid is essential for numerous physiological processes, including nutrient transport, waste removal, temperature regulation, and maintaining cell function. Understanding the balance and distribution of this fluid is crucial for assessing hydration status, diagnosing disorders, and optimizing overall health.
