#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"

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