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OpenStudy (anonymous):
What body part has a joint that works in a manner similar to a door?
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OpenStudy (anonymous):
I think a knee and an elbow, because they only have on direction of motion
OpenStudy (anonymous):
The Knee most likely. Both can only move in two directions. All the other ones can go in other directions.
OpenStudy (anonymous):
The knee, although the elbow can make the same movement it isn't limited to just that one moment in a natural situation.
OpenStudy (anonymous):
Natural meaning not broken or pulled whatnot.
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