Foundations of Body Fluids and Osmolarity

State total body water as a percentage of body weight and list factors that affect it (age, sex, body fat).

Classify body fluid into intracellular fluid (ICF) and extracellular fluid (ECF) and state their relative volumes.

Describe the subcompartments of ECF: plasma, interstitial fluid, and transcellular fluid.

Define osmolarity and osmolality and state the normal plasma osmolarity value.

Explain how osmotic and hydrostatic pressures govern water movement between fluid compartments.