9781422272169

WORDS TO UNDERSTAND ball-and-socket joint— a joint where the round end of a bone (the ball) fits into the cavity (the socket) of another bone cartilaginous joint— a partially moveable joint linked by cartilage hinge joint— a joint between bones (as at the elbow) that permits motion in only one plane pivot joint— a joint that enables you to rotate or twist around a single axis synovial joint— relating to or denoting a type of joint that is surrounded by a thick flexible membrane forming a sac into which is secreted a viscous fluid that lubricates the joint

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