Joints

=Joints= Your joints are what help your bones move by sideways forwards backwards. Did you know that your arm has a ball-and-socket joint. Your hand joint is a sliding joint that can move forwards and backwards. A ball and socket joints allow the greatest range of motion. In your shoulder, the top of the arm bone fits into the deep/bowl-like socket of the shoulder blade (scapula). The joint allows you to swing your arm freely in a circle. Your hips also have a ball-and-socket joint.

=Knee Replacements= In knee replacements your knee is lacking cartilage which is the material that cushions your bones from scraping against other bones.