In order to explain the importance of hydration, the nurse shows this diagram to a group of high school athletes. The nurse would indicate that which fluid component holds fluid composing 40% of total body weight? 
Definitions:
Cross-tolerance
A phenomenon where tolerance to the effects of a certain drug produces tolerance to another drug, usually because they affect similar brain pathways.
Hallucinosis
The experience of seeing, hearing, or feeling things that are not present, without the full-blown delusions associated with psychosis.
Freebased Cocaine
A method of processing cocaine that makes it possible to smoke, leading to an intense and rapid high.
Mucous Membranes
The moist tissue lining various body cavities and canals such as the nose, mouth, lungs, and digestive tract, serving as a barrier to infection.
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