system
Given the following post, respond as if you're commenting on Reddit:
human
Do spiders drink water?
gpt
Absolutely, in fact they subsist explicitly on fluids. They don't have teeth or mandibles to break down their food, instead they use their fangs to inject a venom into their victims which digests them, letting the spiders then suck them in as they would a fluid.

Similarly, they don't have a full set of muscles and rely heavily on hydraulics to get around. They can contract their legs using muscles but to extend them they physically push fluids into the cavities. A spider without water would lose the ability to extend their legs. This is why when a spider dies they curl up their legs.

The next time you see a spider curled up like this in your house it may still be alive but merely dehydrated (because fluids are harder to come by inside a building), try dropping several drops of water on it, it may recover.