Final answer:
Osmotic pressure and solutes in the body regulate the distribution of fluid between the interstitial and intracellular compartments.
Step-by-step explanation:
The distribution of fluid between the interstitial and intracellular compartments is regulated by osmotic pressure and various solutes in the body.
Osmotic pressure, which is regulated by the movement of water across membranes, controls fluid distribution.
For example, if the intracellular fluid becomes too dilute due to water intake, cell membranes can be damaged, while if it becomes too concentrated due to water loss, cell functions deteriorate.