Synovial Fluid: The Frictionless Wonder

The fluid in your joints is so slippery that it makes the stuff you use to grease up your bike chain look like sandpaper. It's called synovial fluid, and it is one of the most frictionless substances on the planet. It's more frictionless than Teflon. This amazing lubricant is crucial for smooth joint movement and is only surpassed by other man-made lubricants like perfluoropolyethers, silicone oils, and graphite. No wonder our joints can move so effortlessly!