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  3. The three classes of joints

What are the differences between the three classes of joints?

Test your knowledge of the different types of joints by answering the following questions. If you get stuck on any of them, you'll find the answers in the article below.

1. _________ joints are slightly moveable.

2. __________ joints are freely moveable.

3. There are ________ types of synovial joints.

4. The bones of the skull are ________ joints.

5. The lubricating fluid in a ball and socket joints is called _________ fluid.

6. The vertebral bodies of the spine are connected by _________ joints.

7. The joints in the limbs are predominantly __________ joints.

8. Synovial joints are held together by ___________ .

What are the differences between the three classes of joints?

Joints are classified according to how movable they are. There are:

Synovial joints are lubricated by a liquid called synovial fluid, and held by ligaments to provide stability. There are several different types of synovial joint, classified according to the shapes of the articulating bones, or by the range of movement they allow, as follows:

Now test your knowledge of the joints of the body with the following quizzes: Quiz 1 --- Quiz 2

Resources :

In this section we've added a few alternative study aids to help you along.