liver Flashcards
liver shape
largest gland 2nd largest organ after skin wedge-shaped the base is directed towards the right apex is directed towards the left
wight of liver
1500g and takes aprox. 2.5% of adult body weight
fetus liver weight
twice as large because it is hemopoietic organ
color of liver
red-brown in color
liver location
right hypochondriac, epigastric and part of left hypochondriac
the borders of the liver
diaphragmatic surface: faces superiorly, anteriorly, and right laterally
visceral surface: posterior and inferior surfaces
there is no distinct demarcation between these surfaces
what is the porta hepatis
deep fissure at the inferior surface of the liver
all neurovascular structures pass through there except hepatic vein
structures of the porta hepatis
hepatic artery, hepatic ducts, hepatic nervous plexus and lymphatic vessels
anatomical division of lobes
- right and left lobes anteriorly separated by falciform lig.
- posterior and inferior sides containing left, right lobe, caudate lobe and quadrate lobe
- groove for IVC, fossa for gallbladder, fissure for ligumentum venosum and fissure for ligumentum teres
bare area of liver
the only part of the liver that has no peritoneal covering (also were gallbladder lies)
- we have IVC which is near fissure of ligumentum venusum (not in bare area)
is there peritoneum present between gallbladder and liver?
no theyre directly related
what are the intrahepatic branches
right lateral
right posterior
right medial
right anterior
recesses (peritoneal gap)
subphrenic recess
subhepatic space
hepatorenal recess
another name of hepatorenal reccess
morrison’s pouch
why is morrison’s pouch an important demarcation
fluid can accumulate in the area when the patient is in the supine position (inpatients), and it would could be very serious if there is an inflammation since more fluid is produced at that point
the five false ligaments
falciform ligaments coronary ligament right triangular ligament left triangular ligament lesser omentum
falciform ligament
the thin, sickle-shaped, fibrous structure that connects the anterior part of the liver to the anterior wall of the abdomen
coronary ligament
superior and inferior coronary ligaments fuse together to form the right triangular ligament (makes up the bare area)
falciform extends to the left side to form the left triangular ligament
the base of the falciform is the
round ligament
the two true ligaments are
ligamentum teres hepatis
ligamentum venosum
Ligamentum venosum
is a fetal remnant of the obliterated ductus venosus which was a fetal branch of the portal vein with the IVC
Ligamentum teres hepatis
a remnant of the obliterated left umbilical vein that extends from the umbilicus to the left branch of the portal vein
blood supply of liver
the hepatic artery divides into left and right branches
- the right divides into anterior and posterior branches.
- left branch divides into medial and lateral branches
the liver receives about 80% of blood supply through the
portal vein
the liver receives about 20% of blood supply through the
hepatic artery
_______brings oxygenated blood to the liver
hepatic artery
_______ bring food laden from abdominal viscera
portal vein
hepatic artery divides into
right and left branches
- right branch: divides into anterior and posterior branches
- left branch divides into medial and lateral branches
hepatic artery divides into
right and left branches
- right branch: divides into anterior and posterior branches
- left branch divides into medial and lateral branches
three main hepatic veins that drain into the inferior vena cava
large central vein (runs between right and left halves of the liver and receives blood from each)
right and left veins that lie lateral to the central vein
