A 32-yrs-old man visits you for a periodic health examination. He has no complaints at this time. He is 170 cm (5 ft 7 in) tall and weights 75 kg. In this patient, the volumes of total body water, intracellular fluid, and extracellular fluid are, respectively.
Total body water (TBW) in liters equals approximately 60% of body weight in kilograms and therefore equals 45 L in a 75-kg person. Intracellular volume = 2/3 of TBW and is therefore 30 L in this case. Extracellular volume = 1/3 of TBW and is therefore 15 L in this case.
40L, 30L, 10L
45L, 30L, 15L
45L, 35L, 10L
50L, 25L, 25L