alleryStart learning →The extracellular fluid accounts for what share of the water content of the body?
AOne quarter of body water
BOne third of body water
COne half of body water
DOne fifth of body water
Answer & Solution
Correct answer: B. One third of body water
1. Extracellular fluid is every drop of body water that is not enclosed inside a cell.
2. It accounts for one third of the water content of the body.
3. The remaining two thirds is intracellular fluid, held in the cytosol of cells.
4. One half would leave too little for the cells, which hold the larger share.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 26 "Fluid, Electrolyte, and Acid-Base Balance", section Extracellular Fluid_
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