#skeletal_system__skeleton__frame__systema_skeletale__systemaskeletale  the hard structure (bones and cartilages) that provides a frame for the body of an animal
  supertype:  system.body_part  a group of physiologically or anatomically related organs or parts; "the body has a system of organs for digestion"
  part:  skeletal_structure
  part of:  musculoskeletal_system
  subtype:  endoskeleton  the internal skeleton; bony and cartilaginous structure (especially of vertebrates)
  subtype:  exoskeleton  the exterior protective or supporting structure or shell of many animals (especially invertebrates) including bony or horny parts such as nails or scales or hoofs
     subtype:  carapace__shell__cuticle  hard outer covering or case of certain organisms such as arthropods and turtles
        subtype:  cuticula  the outer body wall of an insect

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