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Do You Know
Questions & Answers on General Knowledge.

How is the body able to bend?
The human skeleton moves at its more than 230 joints, which are the places where bones connect. Those joints give you a basic range of motion. For example, everyone’s shoulder joints can rotate 360 degrees, and elbows can open and close to just under a 180 degree arc. The pull of ligaments—ropelike connective tissues that anchor one bone to the next around a joint—lengthen a bit to allow a joint to move, but keep the range of motion limited so that you don’t hurt yourself. So, the next time you are tempted to do a backbend or stretch your leg up to your ear, think of your joints and ligaments!
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