Joint

Definition

A joint is a structure where two or more bones are connected, allowing for movement and support. Joints can be classified based on their structure and function, such as synovial, fibrous, and cartilaginous joints.

5 Must Know Facts For Your Next Test

1. Synovial joints are the most common type of joint in the human body and include structures like the knee and shoulder.
2. Fibrous joints are immovable and found in areas such as the sutures of the skull.
3. Cartilaginous joints allow limited movement and include intervertebral discs and pubic symphysis.
4. The synovial membrane secretes synovial fluid which lubricates synovial joints.
5. Ligaments are tough bands of tissue that connect bones at a joint, providing stability.

Review Questions

• What are the three main types of joints based on their structure?
• How does a synovial joint differ from a fibrous joint?
• What role do ligaments play in joint stability?

Related terms

synovialFluid: A lubricating fluid secreted by the synovial membrane that reduces friction in synovial joints.

ligament: A tough band of connective tissue that connects bones at a joint, providing stability.

cartilage:

A flexible connective tissue found in various forms in the larynx, respiratory tract, external ear, and articulating surfaces of joints.