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CROSS-SPECIES ANATOMY - ANNOTATIONS

The Basic subset of the UBERON integrated, cross-species anatomy ontology is downloaded weekly from http://berkeleybop.org/ontologies/uberon/basic.obo. For more information about this ontology see the "About" page on the UBERON website at http://uberon.github.io/about.html.
Term:portal system
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Accession:UBERON:0005806 term browser browse the term
Definition:In the circulatory system of animals, a portal venous system occurs when a capillary bed drains into another capillary bed through veins, without first going through the heart. Both capillary beds and the blood vessels that connect them are considered part of the portal venous system. They are relatively uncommon as the majority of capillary beds drain into veins which then drain into the heart, not into another capillary bed. Portal venous systems are considered venous because the blood vessels that join the two capillary beds are either veins or venules. Examples of such systems include the hepatic portal system and the hypophyseal portal system. Unqualified, 'portal venous system' often refers to the hepatic portal system. For this reason, 'portal vein' most commonly refers to the hepatic portal vein[WP].
Synonyms:exact_synonym: portal venous system
 xref: FMA:45628;   MESH:D011168;   NCI:C33344;   SCTID:362063001;   UMLS:C0226727;   Wikipedia:Portal_venous_system


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Term paths to the root
Path 1
Term Annotations click to browse term
  UBERON ontology 0
    anatomical entity 0
      material anatomical entity 0
        disconnected anatomical group 0
          anatomical cluster 0
            vasculature 0
              portal system 0
                cystic vein 0
                hepatic portal system + 0
                hypothalamo-hypophyseal system 0
                portal vein + 0
                renal portal system + 0
                superior mesenteric vein + 0
Path 2
Term Annotations click to browse term
  UBERON ontology 0
    anatomical entity 0
      material anatomical entity 0
        anatomical structure 0
          multicellular anatomical structure 0
            multicellular organism 0
              anatomical system 0
                circulatory system 0
                  cardiovascular system 0
                    vascular system 0
                      vasculature 0
                        portal system 0
                          cystic vein 0
                          hepatic portal system + 0
                          hypothalamo-hypophyseal system 0
                          portal vein + 0
                          renal portal system + 0
                          superior mesenteric vein + 0
paths to the root