Question

The structures which make it possible for the bones to move at the joints

Answer 1

They are filled with synovial fluid, which acts as a lubricant to help the joints move easily. There are three kinds of freely movable joints that play a big part in voluntary movement: Hinge joints allow movement in one direction, as seen in the knees and elbows.

Answer 2

Answer:

Joints are held together and supported by tough bands of connective tissue called ligaments. Smooth cartilage prevents friction as the bones move against one another.