#umbilical_vein__umbilicalvein__vena_umbilicalis  a vein in the umbilical cord; returns nutrient blood from the placenta to the fetus
  supertype:  vein__vena  a blood vessel that carries blood from the capillaries toward the heart; all veins except the pulmonary carry unaerated blood
  part of:  umbilical_cord__umbilicalcord  membranous duct connecting the fetus with the placenta
     part of:  conceptus__conceptu__embryo__fertilized_egg  an animal organism in the early stages of growth and differentiation that in higher forms merge into fetal stages but in lower forms terminate in commencement of larval life
     part of:  fetus__fetu__foetus  an unborn or unhatched vertebrate in the later stages of development showing the main recognizable features of the mature animal

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