What is the term for a joint that allows for free movement?

A joint that allows for free movement is referred to as a diarthrosis. This type of joint is characterized by the presence of a joint cavity, providing a wide range of motion in various directions. Diarthroses are commonly found in areas such as the knees, elbows, and hips, where flexibility and movement are crucial for physical activity.

The structure of diarthroses typically includes synovial fluid, which lubricates the joint and reduces friction, and articular cartilage that cushions the ends of the bones. This anatomical arrangement is essential for facilitating smooth, unrestricted movement, making diarthroses particularly important in our daily activities and overall mobility.

In contrast, other joint types such as synarthroses are immovable, amphiarthroses allow only limited movement, and syndesmosis refers specifically to a type of fibrous joint where bones are connected by ligaments, neither of which provide the range of motion associated with diarthroses. Understanding these distinctions is crucial in anatomy and the study of joint functions.