#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
  part of:  bone
  subtype:  megakaryocyte  a large bone marrow cell; regarded as the source of blood platelets
  subtype:  osteoclast  cell that functions in the breakdown and resorption of bone tissue
  subtype:  osteocyte  mature bone cell

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