What percentage of body water is found in ICF?

• A. 40%
• B. 60%
• C. 70%
• D. 20%

Answer: (C)

The percentage of body water found in intracellular fluid (ICF) is indeed around 60%. This body water is critical for various physiological processes, as it constitutes a significant volume within cells, contributing to cellular homeostasis, nutrient transport, and biochemical reactions.

Specifically, it is estimated that about two-thirds of the total body water volume is contained within cells (ICF), while the remaining one-third (extracellular fluid - ECF) is found outside of cells in areas like blood plasma and interstitial fluid. Since the total body water typically accounts for about 60% of body weight, this means that the intracellular compartment represents approximately 40% of total body weight, which aligns with the estimation that around 60% of total body water is located in the ICF.

This understanding is crucial when discussing fluid balances, hydration status, and physiological functions, especially in medical contexts or while studying human physiology.