Synovial joints are freely movable because:
A. the ligaments holding the joint together are more elastic.
B. the bones that form the joint are separated from each other and enclosed in a fluid-filled cavity.
C. the muscles attached to the joint are shorter, thus giving them the ability to move in more directions.
D. they are composed of cartilage, which is very soft and cushiony.
Answer: B. the bones that form the joint are separated from each other and enclosed in a fluid-filled cavity.
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