Some Histological Studies on the Digestive System of the Spalax Leucodon (Lesser Blind Mole Rat) Inhabit the Egyptian North Coast

Abstract

He aim of the present study is to revealed some anatomical and histological structure of the digestive system of the blind mole rat (spalax leucodon Egyptiac us). Nine blind mole rat of both sex were used for this study .the digestive system of the lesser blind mole rat is resemble to that of other rodents except some variations. The lip are very small as a flap of skin .the incisor teeth are long, curved and powerful .the stomach is unilocular compound type. The proventriculus is demarcated from the glandular gastric regions by limiting ridge. The glandular region contains simple tubular gland, that lined by three types of cells: mucous neck cells, parietal cells and chief cells. The outer longitudinal muscle layer of both cecum and colon showed teniae. We can concluded that the digestive system of spalax leucodon egyptiacus is similar to that of other rodents, and observed differences due to adaptation to habitat and their diet. 48) Wilczynska, B. (1999) : Histometry and surface area of the alimentary canal of Apodemus flavicollis , Acta Theriologica 44 (1): 2 9-36. 49) Yasamin .T. Qadori (2011) : Histological Studies on Pancreatic Tissue in Diabetic Rats by Using Wild Cherry, the IRAQI postgraduate medical journalVOL.10, NO.3.

Liver anatomy, intrahepatic vascular and biliary branching system of the mole rat (Spalax leucodon)

“…Tammam et al [23] in the study on morphology of the liver in mole rats did not explain according to which nomenclature the liver was divided into: left, right, right central, spigelian and caudate lobes. In our study, the division of the liver into left, quadrate, right medial, right lateral and caudate lobes was adopted to Nomina Anatomica Veterinaria 2017 [7].…”

“…There has been no study in the literature describing the liver and intrahepatic vascular and biliar system of the mole rat. Only topographical position and names of the liver lobes were mentioned by Tammam et al [23] in mole rats. For this reason, our study is the first study on the topography, morphology, intrahepatic ramification of the artery, veins and bile ducts of mole rats (Spalax leucodon) described and ilustrated in detail.…”

“…The livers of those animals were positioned almost in intrathoracic part of the abdominal cavity. Tammam et al [23], in the study on the histological structure of the digestive tract of mole rats, including the liver, mentioned that the liver of this rodent was located in the intrathoracic part of the abdominal cavity. However, our study suggested the presence a small ventral portion of the left lobe (LL) located on the ventral abdominal wall in the regio xiphoidea, which was not discribed in mole rats by Tammam et al [23].…”

“…Tammam et al [23], in the study on the histological structure of the digestive tract of mole rats, including the liver, mentioned that the liver of this rodent was located in the intrathoracic part of the abdominal cavity. However, our study suggested the presence a small ventral portion of the left lobe (LL) located on the ventral abdominal wall in the regio xiphoidea, which was not discribed in mole rats by Tammam et al [23]. This portion of LL is an accessible place for puncture of the liver and further laboratory analysis of this organ.…”

“…The liver lobes, their number and nomenclature, as well as their biliary and vascular system are still the subject of investigation, in several species of the experimental animals, such as the rat [3,5,19,24], rabbit [12,13,16,18,19], guinea pig [19,20,21], nutria [12], chinchilla [9,19], pig [11] and dog [4,22]. The only description of the liver in the mole rat was found of Tammam et al [23], mentioning the nomenclature of the liver lobes, histological structure of the liver as well as the presence of a gallbladder.…”