#nail.horny_structure  horny plate covering and protecting part of the dorsal surface of the digits
  supertype:  #horny_structure__hornystructure__unguis  any rigid body structure composed primarily of keratin
  subtype:  #fingernail  #toenail
  part:  #lunule  #matrix.animal_tissue
  part of:  #integumentary_system__integumentarysystem  the skin and its appendages
  part of:  #digit.extremity__dactyl  a finger or toe in human beings or corresponding part in other vertebrates
     part of:  #vertebrate__craniate  animals having a bony or cartilaginous skeleton with a segmented spinal column and a large brain enclosed in a skull or cranium

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