Which joint allows for free movement?

The correct answer, which identifies the joint that allows for free movement, is the synovial joint. Synovial joints are characterized by a fluid-filled joint cavity that permits a wide range of motion. This type of joint is equipped with components such as articular cartilage, synovial membrane, and ligaments, which work together to allow flexibility and a diverse array of movements, including rotation, flexion, and extension.

In contrast, fibrous joints, such as those found in the skull, are connected by dense connective tissue and allow for little to no movement. Cartilaginous joints, which are connected by cartilage, permit more movement than fibrous joints but still restrict mobility compared to synovial joints. Suture joints, specifically referring to the joints between the bones of the skull, are a subtype of fibrous joints and are immovable. Thus, the unique structure and composition of synovial joints enable the greatest range of motion among all joint types in the human body.