University of Khartoum

Morphology, Histometry, Histochemistry and Haemopoietic Activity of the Liver of the Foetus of the Dromedary (Camelus dromedarius)

Morphology, Histometry, Histochemistry and Haemopoietic Activity of the Liver of the Foetus of the Dromedary (Camelus dromedarius)

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Title: Morphology, Histometry, Histochemistry and Haemopoietic Activity of the Liver of the Foetus of the Dromedary (Camelus dromedarius)
Author: Adam, Fatima Abakar Hussein
Abstract: The objectives of this study were to investigate the morphology, histometry,histochemistry and haemopoietic activity of the liver of the foetus of the dromedary. Ninety threefoetuses of Butana breed and the breed bred by Nomadic Sudanease Arab tribes in South Darfur state were collected from Tamboul andNyala slaughter points and were classified into three groups: First trimester (31 foetuses) ranging between 71 and 130 days of age, second trimester (41foetuses)ranging between 135 and 251 days of age and third trimester (21foetuses) ranging between 257 and 426 days of age. The age of the foetuses was estimated according to the curved crown-rump length (CVRL) method by using the equation: Y= 0.366X – 23.99. Standard international techniques were used. The hepatic primordium appeared in the peritoneal cavity beneath the mesenchyme in a foetus of 71 days of age. The size of the liver increased and occupied most of the abdominal and pelvic cavities in foetuses between 76 and 92 days of age. The shape of the liver varied between quadrilateral, irregular and trianglular during the first, second and third trimesters, respectively. The liver was first developed as right and left lobes while the quadrate and caudate lobes completed their development at the second and the third trimesters, respectively. The average length of the liver was 8, 14.6 and 22.3cm during the first, second and the third trimesters, respectively. The average width of the narrow part of the liver was 2.6, 5 and 7.2cm during the first, second and the third trimesters, respectively. The average width of the broad part of the liver was 4, 9 and 13cm during the first, second and the third trimesters, respectively. The hepatic primordium consisted of hepatocytes and haemopoietic cells. The portal vein and the central vein were developed in a foetus of 76 days of age. The cytoplasm of the hepatocytes possessed large amount of cytoplasmic vacuoles in a foetus of 85 days of age. The primordium of Glissonʼs capsule appeared in a foetus of 74 days of age. The interlobular hepatic cords appeared in a foetus of 229 days of age and disappeared in a foetus of 339 days of age and onward.The development of intrahepatic bile ducts started and was completed in foetuses of 85 and 107 days of age, respectively. The mean diameter of the hepatocytes was 6.4, 7.3 and 6.2µm during the first, second and third trimesters, respectively. The mean diameter of megakaryocytes was 17.4, 18.3 and 24µm during the first, second and third trimesters, respectively. Round and rod mitochondria and rouph endoplasmic reticulum were found in a foetus of 183 days of age and onward. Large lipid droplets and multivesicular bodies appeared in the cytoplasm of hepatocytes. The central vein was lined with continuous layer of fenestrated endothelium in a foetus of 183 days of age and onward. The hepatic sinusoids were lined with complete layer of both fenestrated and unfenestrated endothelium, and Kupffer cells and Hepatic stellate cells were found in a foetus of 278 days of age and onward. Intercellular bile canaliculi appeared in a foetus of 156 days of age and onward. The hepatocytes showed negative reaction for PAS resistant material during the first trimester while reacted positively during the second and third trimesters. The hepatocytes revealed negative reaction for PAS diastase digested material, alkaline phosphatase and acid phosphatase enzymes during the three trimesters. The important information included in this study is vital for the understanding of any malformation of the liver and consequently will provide a better knowledge about the physiological disturbance and pathological change due to malformation.
Description: 120page
URI: http://khartoumspace.uofk.edu/123456789/26463


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