#vascular_structure  a structure composed of or provided with blood vessels
  supertype:  anatomical_structure__structure__complex_body_part__bodily_structure__body_structure  a particular complex anatomical structure; "he has good bone structure"
  subtype:  pulp.vascular_structure  the soft inner part of a tooth
  subtype:  placenta  the vascular structure in the uterus of most mammals providing oxygen and nutrients for and transferring wastes from the developing fetus
     subtype:  afterbirth  the placenta and fetal membranes that are expelled from the uterus after the baby is born

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