Early Embryonic Development of the Liver of the One-Humped Camel (Camelus dromedarius) | ||||
| Journal of Veterinary Anatomy | ||||
| Article 5, Volume 2, Issue 2, October 2009, Page 61-77 PDF (1.38 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jva.2009.42314 | ||||
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| Author | ||||
| Enas Ahmed Ahmed Abd El- Hafez | ||||
| Department of Anatomy & Histology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt. | ||||
| Abstract | ||||
| The present study was carried out to highlight the histomorphological structure of the liver of the one-humped ca-mel during early embryonic life. Samples were collected from pregnant she- camles after slaughtering and evisceration. Different embryonic stages were taken and the crown to rump (CVR) length was measured to the nearest millimeter (ranging from 7 to 185 mm). Morphological study revealed that the liver primordium appeared at 7mm CVR length fetuses. At 12mm CVR length the liver was related cranially to the septum transversum and heart, caudally to the primitive spleen, mesogastrium, and primitive stomach and to the lesser omentum while dorsally it was related to the mesonephrous and ventrally to the floor of the abdominal cavity. Lobation of the liver appeared at fetal lengths of 50 mm CVR length. Histological study revealed that the liver parenchyma consisted of a mass of hepatic foci, haemopoietic cells and irregular wide blood spaces. The primordium of Glisson's capsule appeared in fetuses of 75 mm CVR length. Megakaryocytes were noticed among hepatocytes and heamopoietic foci. Sections stained with theGiemssa stain revealed group of mast cells among hepatocytes. Hepatic tis- sue stained by Methyl green pyroninn stained revealed that hepatocytes showed methyl green positive materials while haemopoietic cells showed pyrinophilic positive granules at 12 mmCVR length fetuses. Small sized mitochondrial granules appeared in the cytoplasm of the hepatocytes stained with Iron haematoxylin in fetuses of 12 mm CVR length. Hepatocytes were faintly stained with PAS. Electron microscopicstudy revealed that the hepatocytes of 185 mm CVR length camel fetuses con- tained large glycogen globlules in addi- tion to abundant mitochondria. Histo- morphometric studies were applied to compare the mean number of hepatic foci to that of haemopoietic foci and also to measure the number and size of megakaryocytes. | ||||
| Keywords | ||||
| Prenatal development; Liver; camel | ||||
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