Agriculture Reference
In-Depth Information
When the calf liver is laid on the table, anterior surface
uppermost, the caudate lobe fits neatly into the liver like
a carpenter's joint.
An adult sheep's liver weighs 453-680 g but undergoes
a marked hypertrophy in ewes approaching parturition.
Pig (Fig. 2.8)
Pig liver has five lobes, two smaller inner, two smaller
outer and a caudate lobe. The oesophageal notch is
prominent, but the identifying feature is the large amount
of visible interlobular tissue which gives the surface of
the organ its classical 'Morocco leather' appearance. The
lobules are mapped out sharply and are polyhedral, and
the organ, because of the amount of interlobular tissue,
is less friable than in the other food animals.
Its weight varies from 0.9 kg in pork pigs to 2 kg
in sows.
Right lateral lobe
Caudal vena cava
1
Esophageal impression
Horse (Fig. 2.9)
Horse liver has three distinct lobes and a thumb piece
which terminates in a point. A notable feature is the
absence of a gall bladder. The horse liver is purplish and
weighs about 4.5 kg.
2
Right
medial
lobe
3
Left
lateral
lobe
Pancreas (gut sweetbread)
The ox pancreas is reddish brown, loosely lobulated and
roughly the shape of an oak leaf. It is attached to the back
of the liver and is deeply notched to accommodate the
portal vein. The average weights of the pancreas are as
Left medial lobe
Figure 2.8
Liver of pig, parietal surface. 1, large hepatic veins
opening into caudal vena cava; 2, coronary ligament; 3, falciform
ligament.
Caudate process
Right triangular
ligament
Renal impression
Caudal vena cava
Attachment of gastropancreatic fold
Portal vein
Portal fissure
Hepatic artery
Attachment of lesser omentum
Hepatic duct
Esophageal impression
Left triangular
ligament
Right
border
Interlobar fissure between
right and quadrate lobes
Left
border
Notch for round ligament
Interlobar fissure between
left and quadrate lobes
Figure 2.9
Liver of horse, visceral surface.
