#Spider curl full

Some scientists think the evolutionary reason for relying on hydraulics is that getting rid of extensor muscles leaves room for bigger, more powerful flexor muscles.

#Spider curl full

To straighten out those joints, spiders pressurize them by pumping them full of hemolymph, the spider equivalent of blood. But the other joints in spidersвЂ™ legs only have flexor muscles. Like how your biceps and triceps allow you to both flex and extend your forearm. So, paired muscles that work against one another. ItвЂ™s equipped with both extensor muscles to extend the legs and flexor muscles to curl them in. The joint where these tubes connect to the body, what you could think of as the вЂњhipвЂќ, works much how youвЂ™d expect. They harness the power of fluids instead! Spider legs are basically a series of little tubes. This spidery leg-curl of death happens because spiders donвЂ™t use muscles to extend their legs. Ever gone to sweep up your floor and noticed a little dead spider mixed in with the dust bunnies? If you paused for a closer look, maybe you noticed that its tiny legs were curled up tight against its body. Looking for SciShow elsewhere on the internet? Marwan Hassoun, Jb Taishoff, Bd_Tmprd, Harrison Mills, Jeffrey Mckishen, James Knight, Christoph Schwanke, Jacob, Matt Curls, Sam Buck, Christopher R Boucher, Eric Jensen, Lehel Kovacs, Adam Brainard, Greg, Ash, Sam Lutfi, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, charles george, Alex Hackman, Chris Peters, Kevin Bealer Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Support SciShow by becoming a patron on Patreon:

SciShow has a spinoff podcast! It's called SciShow Tangents. When spiders die, their tiny legs curl up tight against their body, because spiders donвЂ™t use muscles to extend their legs.