Assertion: portal vein | /r/AtLocation | front anterior
Facets:
value: of the inferior vena cava
type: LOCATION
Source sentences:
text: The portal vein is the most important vein in the portal venous system; it starts its formation close to the level of the second lumbar vertebrae (L2) and it is located in front (anterior) of the inferior vena cava and at the back (posterior) of the neck of the pancreas.