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Your kneecap is hidden inside a tendon
HERE’S THE INTERESTING PART
Not all of your solid skeletal pieces are connected to the main, rigid framework. Sesamoid bones, like the massive patella sitting on your knee, literally form and float entirely suspended within thick bands of tendon. They act as bizarre biological pulleys, actively altering the angle of muscular pull to dramatically increase the localized mechanical leverage of the joint.
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