Skeletal system

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Across
  1. 2. The_______________is a joint that has a rounded surface attached to the depression of another one.
  2. 4. The_______________joint allows rotational moment, our head attached to our spine is an example of it.
  3. 5. When I drop my pencil to the floor I have to________________ to pick it up.
Down
  1. 1. If we dance, run or jump, we are producing________________.
  2. 3. Is a joint that moves back and forth.