#sarcomere  one of the segments into which a myofibril is divided
  supertype:  #segment  one of the parts into which something naturally divides: "a segment of an orange"
  part of:  #myofibril__myofibrilla  one of many contractile filaments that make up a striated muscle fiber
     part of:  #striated_muscle_cell__striated_muscle_fiber  an elongated contractile cell in striated muscle tissue
        part of:  #striated_muscle__skeletal_muscle__striated_muscle_tissue  muscle tissue characterized by transverse stripes

No statement uses or specializes #sarcomere; click here to add one.