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The extracellular fluid is further subdivided into the following body fluid compartments: The intracellular fluid and extracellular fluid are separated by cell membranes.
Extracellular fluid, which is found outside the cells.Intracellular fluid, which is found inside the cells.The distribution of total body water is divided into two major body fluid compartments: This is mostly due to a decrease in muscle mass and an increase in body fat. In old age, the total body water percentage decreases. These differences in total body water percentage between men and women are because of women typically having less muscle mass and a greater amount of adipose tissue than men. In healthy lean people, the total body water comprises 50-60% of body weight in men and 45-50% of body weight in women.
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