#bone_cell  a cell that is part of a bone
  supertype:  somatic_cell__somaticcell  any of the cells of a plant or animal except the reproductive cells
  subtype:  megakaryocyte  osteoclast  osteocyte
  part of:  bone__os  rigid connective tissue that makes up the skeleton of vertebrates
     part of:  endoskeleton  the internal skeleton; bony and cartilaginous structure (especially of vertebrates)

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