#sigmoid_vein__sigmoidvein__venasigmoideu  tributaries of the inferior mesenteric vein; drains the sigmoid colon
  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:  colon  the part of the large intestine between the cecum and the rectum; it extracts moisture from food residues before they are excreted

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