#heart.internal_organ__pump__ticker  the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions pump blood through the body; "he stood still, his heart thumping wildly"
  supertype:  internal_organ__viscus  a main organ that is situated inside the body
  subtype:  athlete's_heart  biauriculate_heart
  part:  coronary_artery  cardiac_muscle  cardiac_valve  valve.anatomical_structure
  part of:  circulatory_system__circulatorysystem__cardiovascular_system  the organs and tissues involved in circulating blood and lymph through the body
     part of:  body__organic_structure__organicstructure__physical_structure  the entire physical structure of an organism (especially an animal or human being); "he felt as if his whole body were on fire"

No statement uses or specializes heart.internal_organ; click here to add one.