Conversation so far:
where is two-thirds of the body's total fluid located
About two thirds of the total body water of humans is held in the cells
where is the majority of the water in human cells found
Water is found mostly in the cytosol of human cells.
where is the remainder of water in human cells found, besides the cytosol
The remainder of the water in human cells is found in the extracellular compartment.

Question: what are the two main compartments for water
Self-contained rewrite: what are the two main fluid compartments in the human body for water