#intercellular_substance__intercellularsubstance__matrix__ground_substance  the body substance in which tissue cells are embedded
  supertype:  body_substance  the substance of the body
  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)
  part of:  connective_tissue  tissue of mesodermal origin consisting of e.g. collagen fibroblasts and fatty cells; supports organs and fills spaces between them and forms tendons and ligaments
  part of:  cartilage__gristle  tough elastic tissue; mostly converted to bone in adults

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