Other joints may move a little, such as the vertebrae. Examples of mobile joints include the following:. Ball-and-socket joints. Ball-and-socket joints, such as the shoulder and hip joints, allow backward, forward, sideways, and rotating movements. Hinge joints. Tendons another type of tough connective tissue on each side of a joint attach to muscles that control movement of the joint.
Tendons connect muscles to bones. Fluid-filled sacs, called bursas, between bones, ligaments, or other nearby structures. They help cushion the friction in a joint. Synovial fluid. A clear, sticky fluid secreted by the synovial membrane.
This is a curved part of cartilage in the knees and other joints. As a joint recovers, the blood will dissipate and the joint fluid will return to normal.
Because of their structural simplicity and because they allow for little or no movement, these two types of joints are generally less prone to injury and problems such as arthritis. You are here Types Joint Anatomy. How Do Synovial Joints Work? By Emmanuel Konstantakos, MD. Peer Reviewed. This ease of motion exists because the boney surfaces are buffered by: A layer of slick articular cartilage that can measure anywhere from less than 1 mm to more than 6 mm thick 1 - 3 0. Characterization of DNA-hyaluronan matrix for sustained gene transfer.
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