Joint

Definition

A joint is a connection between two or more bones in the body that allows for movement and flexibility. Joints are essential components of the musculoskeletal system, facilitating various types of motion.

5 Must Know Facts For Your Next Test

1. Joints can be classified into three main types: fibrous, cartilaginous, and synovial.
2. Synovial joints are the most common type in the human body and include structures like the knee, elbow, and shoulder.
3. Cartilage within a joint reduces friction and acts as a cushion between bones.
4. Ligaments connect bones to other bones at joints and provide stability.
5. Some joints have a limited range of motion (e.g., hinge joints like the elbow), while others have a wide range (e.g., ball-and-socket joints like the hip).

Review Questions

• What are the three main types of joints found in the human body?
• How do synovial joints differ from other types of joints?
• What roles do cartilage and ligaments play within a joint?

Related terms

Cartilage: A flexible connective tissue found in joints that cushions bones and reduces friction.

Ligament: A tough band of connective tissue that connects bones to each other at a joint.

Synovial Fluid: A viscous fluid within synovial joints that lubricates them to facilitate smooth movement.