LIVER & BILIARY TRACT 1 Anatomy

LIVER AND THE BILIARY SYSTEM

1. ANATOMY

The  liver  lies  under  cover of the lower  ribs  in  the  right

hypochondrium and epigastrium and weighs 1200-1600 gms.

*  In an obese adult, the liver is impalpable

*  In  a  thin adult, the lower edge of the liver may be  felt  a

   fingers  breadth below the costal margin, as  the  contracting

   diaphragm  pushes  down  the  liver  at  the  end  of  a  deep

   inspiration.

The segmental division is to the right of the falciform  ligament

in the line with the fossa for the inferior vena cava Fig. 17.1

*  The  right  lobe  is  divided into  an  anterior  segment  and

   posterior segment.

*  The left lobe is divided by the falciform ligament into medial

   and lateral segments.

*  The right anterior and posterior segmental ducts join to  form

   right hepatic.

*  The  left  medial  and lateral ducts join  to  form  the  left

   hepatic duct.

*  Both  join to form the common hepatic which is joined  by  the

   cystic duct to form the common bile duct.

*  The  common  bile  ducts sescends along the  right  margin  of

   hepatoduodenal ligament to the right of the hepatic artery and

   anterior to the protal vein.

*  This supraduodenal portion continues behind the first  portion

   of the duodenum as retroduodenal portion and eventually enters

   the wall of the duodenum to empty into Ampulla of Vater.

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