Estimated total body water for a 70 kg male is approximately how many liters?

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Multiple Choice

Estimated total body water for a 70 kg male is approximately how many liters?

Explanation:
Total body water in an adult is typically about 60% of body weight. For a 70 kg man, that’s 70 × 0.60 ≈ 42 liters. This gives a standard quick estimate of TBW. Values like 49 L would imply about 70% body water, which is higher than the usual range for a healthy adult male; 35 L is about 50% of body weight, which is low for an average adult male; and 56 L corresponds to about 80% water, which is not typical. Remember, TBW can vary with age, sex, and body composition, but 42 L is the common estimate for a 70 kg adult male.

Total body water in an adult is typically about 60% of body weight. For a 70 kg man, that’s 70 × 0.60 ≈ 42 liters. This gives a standard quick estimate of TBW. Values like 49 L would imply about 70% body water, which is higher than the usual range for a healthy adult male; 35 L is about 50% of body weight, which is low for an average adult male; and 56 L corresponds to about 80% water, which is not typical. Remember, TBW can vary with age, sex, and body composition, but 42 L is the common estimate for a 70 kg adult male.

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