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Skeletal
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ILLUSTRATION
NUMBER:
7-05MEV-L6
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DETAIL:

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DESCRIPTION:
Veins of the abdominal viscera (gut) drain into the hepatic
(liver) portal system. They carry nutrient-laden blood to the
liver for processing. All of the veins of the intestines drain
into a large vein called the portal vein. Obstruction of the
hepatic circulation will cause elevated venous pressure in the
portal system. This is called portal hypertension. The pressure
due to portal hypertension is a cause of anal vein dilatations
called hemorrhoids and may cause similar enlargement of the
veins in the esophagus.
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