To understand the knee cap (the patella), first it helps to picture of the movement of the knee joint. Watch this cool animated xray.

Knee Cap

Knee Xray

Now to explore the patella. Try this — stretch a leg out long and relax. Now ever so gently wiggle the knee cap. Then bend the knee. The knee cap becomes unmovable, and firmly anchors the upper and lower leg together.

That silly little knee cap offers the leg both great stability and flexibility…as we bend, straighten, bend, straighten the leg…to walk, run, sit, stand, move through our day.

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