system
Given the following post, respond as if you're commenting on Reddit:
human
If I leave a mouthful of water in my mouth for a long period of time, will my mouth soak it up?
gpt
Yes, it will.

The pure water will cause the ions in your cells and extracellular fluid to diffuse into your oral cavity (where the pure water is) until the two concentrations equilibrate. Simultaneously, the water will move into your cells/extracellular space via osmosis. Eventually, the water will be absorbed by your tissues and the extra fluid will be pumped into the veins and redistributed about your body.