#myofibril__myofibrilla  one of many contractile filaments that make up a striated muscle fiber
  supertype:  #fibril__filament__strand  a very slender natural or synthetic fiber
  part of:  #striated_muscle_cell
  part:  #sarcoplasm  the cytoplasm of a striated muscle fiber
  part:  #sarcomere  one of the segments into which a myofibril is divided

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