The knee is an example of what type of joint?

The knee is classified as a synovial joint, which is characterized by the presence of a joint cavity filled with synovial fluid, allowing for a wide range of motion between the articulating bones. Synovial joints are further classified into different types based on their shapes and the movements they allow, such as hinge (which applies to the knee), ball-and-socket, pivot, and others.

The knee joint specifically functions primarily as a hinge joint, permitting flexion and extension movements. The synovial structure provides lubrication, reduces friction, and absorbs shock during motions such as running or jumping. Furthermore, it has ligaments that stabilize the joint and menisci that deepen the joint cavity and act as shock absorbers.

This organization allows the knee to support weight and enable movement efficiently, highlighting its role as a synovial joint in the human musculoskeletal system.