DMSG1321--CH.11 the portal venous system Exam Questions with Correct Answers 100%
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hilum an indentation, depression, or pit on an organ forming a doorway or area of
entrance and exit for vessels, ducts, & nerves; aka hilus or hilar area
main portal vein (MPV) formed by the confluence or junction of the splenic vein and the
superior mesenteric vein at the level of the 2nd lumbar vertebra
- directly posterior to the neck of the pancreas & anterior to the IVC
- runs approximately 5-6 cm superiorly & rightward, posterior to the 2nd portion of the
duodenum & then ascends to the liver hilum where it divides into right & left
- along this course to the liver, the portal vein runs posterior to & between the common bile
duct & hepatic artery, with the artery lying medial to the duct
- enters the liver at the porta hepatis
- along with its tributaries, it delivers blood from the spleen & gastrointestinal tract to the liver
for metabolism & detoxification
- serves as the posterior border of the pancreas
left portal vein (LPV) the left branch of the main portal vein
- it courses horizontally to the left and branches into medial (umbilical) & lateral (transverse)
branches that send multiple branches into the caudate lobe & then to the medial & lateral left
lobes of the liver
- posterior to the ligamentum teres (obliterated umbilical vein)
- longer & narrower than the RPV
right portal vein (RPV) the right branch of the main portal vein
- it courses through the right lobe of the liver and branches into anterior and posterior branches
that further subdivide into multiple branches throughout the right lobe
- some branches send also send blood to the caudate lobe, making the caudate the only liver
segment supplied by both RPV & LPV
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hilum an indentation, depression, or pit on an organ forming a doorway or area of
entrance and exit for vessels, ducts, & nerves; aka hilus or hilar area
main portal vein (MPV) formed by the confluence or junction of the splenic vein and the
superior mesenteric vein at the level of the 2nd lumbar vertebra
- directly posterior to the neck of the pancreas & anterior to the IVC
- runs approximately 5-6 cm superiorly & rightward, posterior to the 2nd portion of the
duodenum & then ascends to the liver hilum where it divides into right & left
- along this course to the liver, the portal vein runs posterior to & between the common bile
duct & hepatic artery, with the artery lying medial to the duct
- enters the liver at the porta hepatis
- along with its tributaries, it delivers blood from the spleen & gastrointestinal tract to the liver
for metabolism & detoxification
- serves as the posterior border of the pancreas
left portal vein (LPV) the left branch of the main portal vein
- it courses horizontally to the left and branches into medial (umbilical) & lateral (transverse)
branches that send multiple branches into the caudate lobe & then to the medial & lateral left
lobes of the liver
- posterior to the ligamentum teres (obliterated umbilical vein)
- longer & narrower than the RPV
right portal vein (RPV) the right branch of the main portal vein
- it courses through the right lobe of the liver and branches into anterior and posterior branches
that further subdivide into multiple branches throughout the right lobe
- some branches send also send blood to the caudate lobe, making the caudate the only liver
segment supplied by both RPV & LPV
