Learn about the Joints of the Skeleton in this educational video from dizzo95.
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Male Speaker: The bones of the skeleton connected joints. Some joints are fixed and some allow movement. The bones of the cranium are fixed firmly together their job is to protect the brain, so they must not move about. The joints of the vertebra can move slightly to allow bending and movement of the head. The best joints for movement are the hinge joints at knee and elbow and the ball and socket joints at hip and shoulder. In the knee joint cartilage allows smooth movement and prevents rubbing, the ligaments are tough connecting fibers keeping the bones in place. Synovial fluid lubricates the cartilage and is kept in place by a capsule. The knee cap in front is connected to muscles and helps straighten the joint, surrounding the joint is a complex system of rat muscles ligaments and tendons each design provides supportant movement.