In a 70 kg adult, the total body water is approximately

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Multiple Choice

In a 70 kg adult, the total body water is approximately

Explanation:
Total body water in a healthy adult is about 60% of body weight. For a 70 kg person, that’s roughly 42 liters. This TBW is distributed into intracellular fluid (about two-thirds, around 28 L) and extracellular fluid (about one-third, around 14 L). The other numbers correspond to either a single compartment (28 L as intracellular or 14 L as extracellular) or an overall TBW far larger than typical for a 70 kg adult (60 L would imply an unusually high TBW percentage).

Total body water in a healthy adult is about 60% of body weight. For a 70 kg person, that’s roughly 42 liters. This TBW is distributed into intracellular fluid (about two-thirds, around 28 L) and extracellular fluid (about one-third, around 14 L). The other numbers correspond to either a single compartment (28 L as intracellular or 14 L as extracellular) or an overall TBW far larger than typical for a 70 kg adult (60 L would imply an unusually high TBW percentage).

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