Why Do Spiders Curl Up When They Die?

The video explores the unique anatomy of spider legs, which rely on hydraulic pressure rather than muscles to extend. This adaptation allows spiders to maximize their flexor muscles for gripping and climbing. Upon death, spiders experience rigor mortis, leading to their characteristic curled leg position due to the lack of ATP and pressurized hemolymph. The video also highlights how spider leg mechanics inspire the design of lightweight and flexible robots.

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