Document Details

Document Type : Thesis 
Document Title :
Urogential systems in some Squamates at the Western Region of Saudi Arabia
الجهاز البولي التناسلي في بعض الحرشفيات بالمنطقة الغربية من المملكة العربية السعودية
 
Subject : Biological 
Document Language : Arabic 
Abstract : The urinogenital system of Bunopus tuberculata. Chamaeleo chameaeleon orientals and Psammophise schokari has been investigated The Kidney in the three species is composed of nephric units. In BunoQus. the I nephric unit consists of a Malpighian body open into a collecting tubule, The latter is bult up of a double -walled Bowmans capsule and a central glomerulus. Malpighian body leads into a short neck segment which is lined by cuboidal cells most of which are ciliated .The neck leads to the long proximal convoluted segment which is lined by short columnar cells with brush border. The short intennediate segment is lined by short ciliated cuboidal cells and pyramidal cells. The wide distal convoluted segment is lined by cuboidal cells. The collecting tubule is lined by columnar and short columnar cells. During the breeding season, the tenninal segments and the collecting tubules in the male kidney form the sexual segment. The nephric unit in Chamaeleo consists of the same segments as in BunoQus, but the Malpighian bodies are larger, more numerous and of different shapes. The proximal and distal convoluted segments are longer than those in BunoQus .More over, the lining epithelium of the different parts of the tubule is slightly shorter and thinner. The tenninal segments in the male fOnD the sexual segment. The" nephric units in the kindy of PsammoQhis are much more numerous and longer than the corrosponding ones in BunoQus and Chamaeleo .The tenninal segment fonDS the sexual segment. The testis in BunoQus is surrounded by a tunic albuginea The seminiferous tubules are separated by groups of large interstitial cells. The seminiferous tubule is lined--with spennatogenic cells arranged in an irregular pattern. The Sertoli cells are observed. The tunic albuginea of the testis of Chamaeleo is thinner than that of BunoQus and the seminiferous tubules are more crowded. The spennatogenic cells lining the seminiferous tubules are arranged ina regular pattern. Sertoli cells are also observed. In general the spennatogenic cells are smaller than in BunoQus. The seminiferous tubules in the testis of Ps~mmoQhis are larger than those in the testis of both BunoQus and Chamaeleo. The germinal cells are arranged in a regular pattern as in the latter. The interstitial cells are more numerous than in both BunoQus and Chamaeleo. - The Ovary of BunoQus is invested by a thin peritoneal layer followed inwards by a thin layer of fibrous connective tissue and a genninal epithelium respectively. There are two genninal beds. The developing oocytes differ in size and in their single, bilayered or multilayered and polymorphic membrana granulosa. small, intennediate and pyrifonn cells are observed in this granulosa. There are 3 -5 corpora lutea and one or two of atretic ova. The ovary of Chamaeleo contains larger and more numerous oocytes than those of -BunoQus. The granulosa contains the same cellular elements as in BunQQus. Each ovary contains 19-25 corpora lutea .The atritic ova are rarely observed. Each lobe of the ovary of PsammoQhis contain one germinal bed , small number of oocytes and one or two corpora lutea .The membrana granulosa of the large oocytes contains small and large cells. In the case of BunoQus the author has met with a hennophrodite female which has a functional ovary and a poorly developed testis on both sides . 
Supervisor : Prof. Abdulaleem Abdulwahab Faraj 
Thesis Type : Master Thesis 
Publishing Year : 1417 AH
1996 AD 
Added Date : Thursday, June 12, 2008 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
ماجد عمر حسن رجبHassan Rajab, Majed OmarResearcherMaster 

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