Final answer:
Most of our total body water is located inside cells as intracellular fluid, making up approximately 60 percent of our total body water.
Step-by-step explanation:
The majority of our total body water is located inside cells. When we consider the distribution of body water, we find that most of our water is in the form of intracellular fluid (ICF). The ICF is the principal component of the cytosol/cytoplasm. It makes up about 60 percent of the total body water, which is more than any other compartment, including the blood, the lumen of the gastrointestinal tract, or the lumen of the kidneys.
Osmosis is a process by which water moves through semi-permeable membranes, and it is how water balances itself across different compartments in the body. The amount of water in the ICF is closely regulated, ensuring that cells maintain proper function and do not burst or become dehydrated.
In contrast,extracellular fluid, which includes interstitial fluid (the fluid that bathes all of the body's cells except for blood cells) and the fluid component of blood, makes up a smaller proportion of total body water when compared to intracellular fluid.