![](http://www.alamy.com/thumbs/6/BFC81453-77A6-42CE-8EA7-51EBD4714337/JEWRX3.jpg)
physiology knees
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Photo credit: © Roberto Biasini / Alamy / Afripics
License: Royalty Free
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Keywords: abduction, adduction, adductor, extension, flexion, gluteus, joint, knee, knees, leg, limb, maximus, muscles, physiology, quadriceps, semimembranosus, semitendinosus, tensor, thigh