TIL Spiders don't have muscles in their legs. They extend them using a system of hydraulics powered by their blood pressure. When they die, spiders' legs curl up because the blood pressure is gone.

Fazal 7:31 AM reddit: the front page of the internet

TIL Spiders don't have muscles in their legs. They extend them using a system of hydraulics powered by their blood pressure. When they die, spiders' legs curl up because the blood pressure is gone.

submitted by /u/itCompiledThrsNoBugs to r/todayilearned
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