#vein_of_penis  a vein serving the penis
  supertype:  #vein__vena  a blood vessel that carries blood from the capillaries toward the heart; all veins except the pulmonary carry unaerated blood
  subtype:  #venae_dorsales_penis_superficiales  superficial dorsal veins of the penis; paired tributaries of the external pudendal veins on each side
  subtype:  #venae_dorsales_penis_profunda  deep dorsal vein of the penis; tributary of the prostatic plexus
  subtype:  #vena_profunda_penis  deep vein of the penis; enters the prostatic plexus

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