Anatomy - GI COPY COPY Flashcards
What is this structure and what does it do?
-Hepatic portal vein
-All products of digestion, except lipids, are transported to the liver from the gut through the hepatic portal vein
Where is the liver and when is it palpable?
-Right upper guadrant
-Epigastrium
-Below right costal margin during inspiration
What surface of the liver is this?
-Diaphragmatic surface
-Anteriosuperior
-Related to inferior diaphragm surface
What surface of the liver is this?
-Visceral surface
-Posterioinferior
-Related to other organs
Regions of liver not covered by visceral peritoneum:
-Bare area of liver
-Region where gallbladder in contact with liver
-Porta hepatis
What does this show?
Liver areas not covered by visceral peritoneum
Label the diagram:
Label the structure:
What does it do?
-Falciform ligament
-Separates the left and right lobes
-Connects anterior surface of the liver to internal aspect of anterior abdominal wall
What are these and what do they all receive?
-8 functional segments of liver
-Each have their own branch of hepatic artery and portal vein
-Have their own hepatic duct
Label this diagram:
What enters the liver at the porta hepatis?
-Right and left hepatic arteries
-Right and left portal veins
-Right and left cystic ducts
how does venous blood exit the liver?
-2 or 3 large hepatic veins
-Within liver - not visible
-Unite with IVC posterior to liver
Difference between hepatic veins and hepatic portal veins:
-HPV - receive nutrient rich blood from gut from superior and inferior mesenteric veins and splenic vein
-HV - venous blood leaves liver via IFC
What is the nerve innervation to the liver?
-Hepatic plexus
-Parasympathetic fibres from vagus
-Also sympathetic fibres
-Follow paths of hepatic vessels and biliary tree ducts
What is the liver anatomically related to?
-Diaphragm connection via triangular and coronary ligaments
-Anterior abdominal wall via falciform
-Stomach and duodenum via lesser omentum
What does this show the entrance to and what is it in relation to?
-Entrance of lesser sac
-Portal triad on free edge of lesser omentum
-Form anterior boundary of epiploic foramen -> entrance to lesser sac
What 2 things are hidden?
-Hepatorenal recess - between right kidney and posterior surface of right liver side
-Left and right subphrenic recess - either side of falciform ligament - between anterosuperior surface of liver and diaphragm
What is this?
-Round ligament of the liver (ligamentum teres)
-Remnant of umbilical vein (blood from placenta to foetus)
What is this?
-Ligamentum venosum
-Remains of ductus venosus (diverted blood from umbilical vein to IVC)
Label this diagram:
-Gallbladder on posteroinferior side of liver
-Body lies in gallbladder fossa
-Fundus extends to inferior liver border
What is this the surface marking of?
-Fundus of gall bladder
-9th costal cartilage
-Midclavicular line intersects 9th costal cartilage
Explain the pathway of bile in the liver:
-Produced by hepatocytes
-Excreted into small channels called bile canaliculi
-Canaliculi drain into bile ducts
-Bile ducts converge into right and left hepatic ducts
Pathway of the bile duct:
-Runs in free edge of lesser omentum
-Posterior to superior duodenum
-Posterior to pancreas head
-Enters duodenum
Vasculature of gall bladder:
-Cystic artery (arises from right hepatic)
-Cystic vein (directly into liver or HPV)