César Pelizer The knees are hinge joints, meaning they work like a door ... and certain types of physical activity — affecting the bones, ligaments, cartilage or muscles in and around the ...

The shoulder is one of our strangest and most complex joints. Rather than two bones meeting in a hinge-like structure, we have multiple bones coming together to form the joint, including the scapula, ...

Zhe-Xi told Popular Science that the mammalian jaw hinge is unique because ... These had a jaw joint consisting of two separate bones - the quadrate of the skull and the articular in the lower ...