Body and it's movement

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Across
  1. 4. The ribs that are not attached to the backbone.
  2. 6. The fins of a fish that help it the move forward.
  3. 7. A farmer's friend.
Down
  1. 1. This framework of bones protect, support and helps in movement of the body.
  2. 2. A soft substance that is between the bones and reduces frictiom.
  3. 3. A soft substance in the bones that creates blood cells.
  4. 5. This part of the skeletal system protects the spinal cord.
  5. 6. Part of the skeleton that protects the brain.