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Selection bias occurs more frequently in systematic samples than in simple random samples.
Bursae
Small fluid-filled sacs located between bones and soft tissues, acting as cushions to reduce friction and allow free movement.
Synovial Membrane
A specialized connective tissue that lines the inner surface of capsules of synovial joints and tendon sheath, producing synovial fluid for lubrication.
Air
The invisible gaseous substance surrounding the earth, a mixture mainly of oxygen and nitrogen.
Blood Vessels
Cylindrical formations responsible for transporting blood all over the body, encompassing arteries, veins, and capillaries.
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