system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: When shot/wounded, why are you so thirsty for water?
gpt
If you have a *significant* amount of blood-loss you can experience feelings of dehydration.

All the cells in your body have lots of water stored in them. When you bleed, you're losing blood, but also the right amount of fluid in your arteries/veins to keep everything flowing. (Think of a garden hose that is just trickling out water, because you don't have enough water coming from the tap)

What you body can do, to make up for the blood you're losing, is pull the water that's stored in your cells into your bloodstream. Less water in your cells means dehydration.

Although, losing that much blood, drinking water is probably not on your mind.