An example of a structural joint is a synovial joint, such as the knee, elbow, or shoulder.
Structural joints are classified based on the material that binds the bones together and whether or not a joint cavity is present. There are three main types of structural joints: fibrous, cartilaginous, and synovial.
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Fibrous Joints: These joints are connected by dense connective tissue, primarily collagen. They generally allow for little to no movement. Examples include sutures in the skull and syndesmoses (like the interosseous membrane between the radius and ulna).
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Cartilaginous Joints: These joints are connected by cartilage. They allow for more movement than fibrous joints but less than synovial joints. Examples include the pubic symphysis and intervertebral discs.
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Synovial Joints: These are the most movable type of joint. They are characterized by a fluid-filled joint cavity. Examples include the knee, elbow, shoulder, and hip. Synovial joints allow for a wide range of motion due to their complex structure, which includes articular cartilage, ligaments, and a synovial membrane that produces lubricating synovial fluid. While they offer great mobility, synovial joints are also the most susceptible to injury.
The question specifically asked for an example of a structural joint, and the reference provided the knee, elbow, and shoulder as examples of synovial joints. Since synovial joints are a type of structural joint, the provided answer aligns with the question and the reference material.
