#vertebra  one of the bony segments of the spinal column
  supertype:  bone__os  rigid connective tissue that makes up the skeleton of vertebrates
  subtype:  cervical_vertebra  thoracic_vertebra  lumbar_vertebra  sacral_vertebra  coccygeal_vertebra
  part of:  spinal_column
  part:  centrum  the main body of a vertebra
     part:  hemal_arch__hemalarch__haemal_arch  a structure arising ventrally from a vertebral centrum and enclosing the caudal blood vessels
     part:  neural_arch__vertebral_arch__vertebralarch  a structure arising dorsally from a vertebral centrum and enclosing the spinal cord
  part:  apophysis__apophysi  (anatomy) a natural outgrowth or projection on an organ or part such as the process of a vertebra
  part:  transverse_process  one of two processes that extend from each vertebra and provide the point of articulation for the ribs

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