Morphology and Topography of the Pancreatic Ducts during Posthatch Development in Kuttanad Duck (Anas platyrhynchos domesticus)
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Authors
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H. S. Patki
College of Veterinary and Animal Sciences, Pookode, Wayanad, Kerala-673576.
Keywords:
Kuttanad duck, Morphology, Pancreatic duct, Posthatch development.Abstract
Posthatch development of the pancreatic ducts was studied in Kuttanad ducks using 78 female ducklings
from day of hatch to 24 weeks of age. The pancreas possessed three morphologically distinct extrapancreatic
ducts viz., chief dorsal, ventral and accessory dorsal extrapancreatic ducts, during the posthatch period. Ventral
extrapancreatic duct drained ventral lobe whereas, dorsal lobe was jointly drained by chief dorsal extrapancreatic
duct and accessory dorsal extrapancreatic duct. Chief dorsal extrapancreatic duct also drained splenic lobe. All
the three extrapancreatic ducts opened separately in the ascending limb of duodenum in all the age groups.The
accessory dorsal extrapancreatic duct was the first to open into the ascending limb of duodenum a few millimetres
proximal to the apex of duodenal loop. It was followed by the opening sites of chief dorsal and ventral
extrapancreatic ducts respectively, a few centimetres distally. Micrometrically, the diameter of ventral
extrapancreatic duct was higher than chief dorsal extrapancreatic duct followed by accessory extrapancreatic
duct. Intrapancreatic course of all the three ducts on radiographic study revealed that accessory dorsal
extrapancreatic duct was direct continuation of caudal branch of chief dorsal pancreatic duct.