Which description best fits diarthroses joints?

Diarthroses joints are best described as freely movable joints. This classification includes various types of joints that allow a considerable range of motion in multiple directions, which is crucial for activities such as walking, bending, and rotating. Examples of diarthroses joints are the knee, hip, and shoulder joints, which contain a synovial cavity filled with synovial fluid, allowing for smooth movement between the articulating surfaces.

The range of motion in diarthroses joints can be complex and is supported by joint capsules, ligaments, and synovial membranes, making them essential for dynamic actions in the body. The presence of these features differentiates them significantly from other joint types that have limited or no movement.