Anatomy of the liver
Transcript of Anatomy of the liver
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ANATOMY OF THE LIVER
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WHAT IS IT?
Largest glandular organ in the body
1.4-1.6 g in weight
Rich blood supply approx. 1500ml of blood permin
Very important all nutrients from the git (except
for fat) travel via the portal system to the liver .
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WHERE IS IT?
The liver lies in the right hypochondrium and
right epigastrium with a portion in the left
hypochondrium directly below the diaphragm.
Directly above the gall bladder
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WHERE IS IT?
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LOBES: 4 LOBES ANATOMICALLY
Anatomically divided into right and left lobes
divided anteriorly by the line of attachment of
falciform ligament and viscerally by the
ligamentum teres and ligamentum venosum.
Caudate lobe lies between inferior vena cava
and fissure of ligamentum venosum
Quadrate lobe lies between gall bladder fossa
and fissure of ligamentum teres
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LOBES: 4 LOBES ANATOMICALLY
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SURFACES
Convex diapragmatic surface
Posterior inferior surface is molded to
accommodate viscera
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BLOOD SUPPLY
The liver has dual afferent blood supply.
The portal vein (dominant) and the hepatic
artery Portal vein 75% 80% blood supply remainder
hepatic artery
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BLOOD SUPPLY (ARTERIAL)
The hepatic artery, a branch of the celiac trunk,may be divided into the common hepatic artery,from the celiac trunk to the origin of thegastroduodenal artery, and the hepatic arteryproper, from the origin of the gastroduodenalartery to the bifurcation of the hepatic artery. At orclose to the porta hepatis (hilum of liver), thehepatic artery and portal vein terminate by
dividing into right and left branches; these primarybranches supply the right and left livers,respectively.
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VENOUS BLOOD SUPPLY AND
DRAINAGE
Portal vein drains the GIT and takes nutrient rich
blood to the liver. Portal supply meets approx. 50%
of the livers oxygen demand
Venous drainage via right, intermediate and left
hepatic veins
The hepatic veins, formed by the union of
collecting veins that in turn drain the central veinsof the hepatic parenchyma open into the Inferior
vena cava just inferior to the diaphragm.
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PORTAL SYSTEM
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LYMPHATICS
3- 4 lymph nodes are found in the porta
hepatis and drain both the liver and gall
bladder.
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NERVE SUPPLY
Sympathetic = fibres from the coeliac ganglia
Parasympathetic = vagal fibres from the
hepatic branch of the anterior vagal trunk
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HISTOLOGY
LIVER LOBULES
From anatomy at a glance
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HISTOLOGY
LIVER LOBULES
The liver is made up of multiple hexagonalfunctional units
Branches of the portal vein and hepatic artery
transport blood throughportal canals into a centralvein by way of sinusoids which traverse thelobules.
The central veins ultimately coalesce into theright, left andcentral hepatic veins which drainblood from corresponding liver areas backwards
into the IVC. The portal canals also containtributaries of the hepatic ducts which serve todrain bile from the lobule down the biliary tree.
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REFERENCES: IMAGES
http://www.cancer.net/patient/Cancer+Types/
Liver+Cancer/ci.Liver+Cancer.printer
Anatomy at a glance
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REFERENCES: INFORMATION
Lasts Anatomy
Anatomy at a glance
http://en.wikipedia.org/wiki/Liver