The joints (add subtitles to the video by clicking on the square button on the lower right side) https://www.youtube.com/watch?v=DLxYDoN634c
The synovial joints are the joints in the body that can easily move over a large range. The elbow, the shoulder and the neck joint are all examples of a syniovial joint. Because of a special fluid in the joint, called the synovial fluid, theese joint move smootly. The fluid act as a lubricant and is formed and secreted (uitgescheiden) by the synovial membrane. Strong bands of connective tissue hold the bones together. These bands are called ligaments.
There are several forms of synovial joint as described in the video but for the purpose of this class we'll look at three different types: