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A fish normally displaces its own
Periosteum
A thick layer of blood vessel-filled connective tissue that surrounds bones, excluding the joint surfaces.
Bursa
A fluid-filled sac that reduces friction and provides cushioning between bones, tendons, and muscles near joints.
Fluid-filled Cushion
A protective layer or structure within the body comprised of fluid, providing support or absorbing shock, common in joint and tissue spaces.
Articulating Surface
The surface of a bone that makes contact with another bone, allowing for joint movement.
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