GROSS AND MICROANATOMY OF THE HEPATOPANCREATIC ORGAN IN GUINEA PIG {Cavia porcellus)
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Date
2021
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Abstract
The present study was undertaken to access the gross and microanatomy of
hepatopancreatic organs namely liver, gall bladder and pancreas in guinea pigs of two
prenatal and four postnatal age groups. Hepatopancreatic organs were collected from
the guinea pigs received from department of Laboratory Animal Medicine, Chennai.
Gross anatomical observations and morphometrical measurements were recorded.
Tissue pieces of hepatopancreatic organs in all age groups were subjected to routine
and special histological, histochemical, immunohistochemical and transmission and
scanning electron microscopic techniques.
The liver was located in the cranial right side of the abdominal cavity and was
reddish brown in colour with six lobes, two surfaces and four borders. Falciform,
coronary, round, triangular, hepatorenal and hepatogastric ligaments were observed in
all postnatal ages. The gall bladder was pearshaped and located in gall fossa of liver.
Cystic duct was the duct of gall bladder. Pancreas was irregular in shape with splenic,
ventricular and intestinal lobes. The morphometric parameters of hepatopancreatic
organs were increased with age.
The capsule of liver was dense regular type with collagen and reticular fibres.
Septa were not evident in the parenchyma except at portal areas. The parenchyma
appeared as hexagonal lobules with large polygonal in shape hepatocytes with
eosinophilic vacuolated cytoplasm and round basophilic nucleus ananged in radiating
cords from central vein to periphery. Sinusoids lined by flattened epithelial cells were
found between the cords and contained Kupffer cells.