#iliac_vein__iliacvein__vena_iliaca  one of three veins draining the pelvic area
  supertype:  #vein__vena  a blood vessel that carries blood from the capillaries toward the heart; all veins except the pulmonary carry unaerated blood
  subtype:  #hypogastric_vein__hypogastricvein__internal_iliac_vein  a vein that unites with the external iliac vein to form the common iliac vein
  subtype:  #external_iliac_vein  a continuation of the femoral vein; unites with the internal iliac vein to form the common iliac vein
  subtype:  #common_iliac_vein  formed by the internal and external iliac veins; unites with its fellow from the opposite side of the body to form the inferior vena cava

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