The following are true about body water:
**Core Concept**
Body water refers to the total amount of water present in the human body, which is approximately 60% of the total body weight. It is composed of various compartments, including intracellular fluid (ICF), extracellular fluid (ECF), plasma, and interstitial fluid.
**Why the Correct Answer is Right**
The correct answer is related to the distribution of body water in the different compartments. The ECF accounts for approximately 20% of the total body weight, while the ICF accounts for approximately 40%. The remaining 40% is distributed between the plasma and interstitial fluid. The ECF is further divided into plasma and interstitial fluid, with the plasma accounting for approximately 5% of the total body weight and the interstitial fluid accounting for approximately 15%.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not accurately represent the distribution of body water in the different compartments.
**Option B:** This option is incorrect as it is too broad and does not provide specific information about the distribution of body water.
**Option C:** This option is incorrect as it is not a true statement about body water.
**Clinical Pearl / High-Yield Fact**
It is essential to remember that the ECF is the most dynamic compartment, with a turnover rate of approximately 5% per hour. This is in contrast to the ICF, which has a much slower turnover rate.
**Correct Answer: D**