Define synovial joints.
Answers
A synovial joint, also known as diarthrosis, joins bones with a fibrous joint capsule that is continuous with the periosteum of the joined bones, constitutes the outer boundary of a synovial cavity, and surrounds the bones' articulating surfaces. The synovial cavity/joint is filled with synovial fluid.
Synovial joints are the most movable type of joint found in the human body. Joints are formed where bones come together. The six types of synovial joints are the pivot, hinge, saddle, plane, condyloid, and ball-and-socket joints.
The six types of synovial joints are pivot, hinge, condyloid, saddle, plane, and ball-and socket-joints.
The six types of synovial joints allow the body to move in a variety of ways.
Answer:
Explanation:
synovial joint is the type of joint found between bones that move against each other, such as the joints of the limbs (e.g. shoulder, hip, elbow and knee). Characteristically it has a joint cavity filled with fluid. Other types of joint allow little or no movement, including fibrous joints (e.g between the bones of the skull) and cartilaginous joints (e.g. between the ribs and the breastbone).
A synovial joint is made up of:
cartilage – a smooth gristly material that covers the surface of the bones. This acts as a shock absorber and reduces friction as the bones move over each other.
joint capsule – a fibrous material that encloses the joint. Together with the ligaments, tendons and muscles, the capsule keeps the bones of the joint in place.
synovial fluid – a clear sticky substance that fills the synovial cavity and nourishes and lubricates the cartilage surfaces as they move against each other, like oil lubricating a piston.
synovial membrane (or synovium) – a special layer of cells that lines the joint capsule and produces the synovial fluid.
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