Document Details

Document Type : Article In Journal 
Document Title :
HISTOLOGICAL AND UL TRASTRUCTURAL EVIDENCES OF CHROMAFFIN CELLS AND INTERRENAL TISSUE IN THE HEAD KIDNEY OF OREOCHROMIS NILOTICUS AND EPINEPHILUS TUVINA (TELEOSTS)
هيستولوجيكال و أدلّة تراستركتشرال الجامعة اللّبنانيّة لخلايا كرومافين و نسيج إنتررينال في كلية الرّأس لأوريوتشروميس نيلوتيكس و إبينيفيلس تفينا ( تيليوستس )
 
Subject : HISTOLOGICAL AND UL TRASTRUCTURAL EVIDENCES OF CHROMAFFIN CELLS AND INTERRENAL TISSUE IN THE HEAD KIDNEY OF OREOCHROMIS NILOTICUS AND EPINEPHILUS TUVINA (TELEOSTS) 
Document Language : English 
Abstract : This work presents the structure and ultra structure of the chromaffin cells (CCs) and the interrenal tissue (It), as well as the morphology of the head kidney of the fresh water fish, Oreochromis niloticus and the salt water fish, Ěpinephilus tuvi;w, The head kidney is composed of fused bilateral lobes located anterior to the swim bladder and ventrolateral to the spinal cord. The parenchyma reveaLed lympho-haemopoietic tissue, melano-macrophage centre, chromaffin eells and interrenal tissue. Chromaffin ceUs were found in small groups under the endothelium of the posterior cardinal vein and it's branches (pCV s) c10sely associated with the interrenal tissue. Ultrastructural analysi& confirmed the existence of two main types of chromaffm cells, distinguished on the basis of different types of secretory granules. The frrst type is characterized by the presence of vesicles with spherical ~d strongly electron-dense core granules, which are eccentrically located .. Such cells were interpreted as noradrenaline cells. Meanwhile, vesicles that were completely electron-Iucent or containing small less dense granu1es with smaU halo separating the granule from the vesicular limiting membrane were iden.tified as adrenaline cells. The interrenal tissue consisted of cords or strands of cells grouped around the posterior cardinal vein and their branches and interposed with the haemopoietic tissue. Ultrastmcture analysis has revealed only one interrenal cell type which contains abundant sER and numerous mitochondria with tubulo-vesicular cristae, characteristics ofa steroid producing cell. High innervation of the chromaffin cells was clearly dernonstrated in E. luvina. Many unmyelinated axons emerged frorn nerve bundle invading the clusters of chromaffin cells in E, tuvina. Nerve endings were attached to the chromaffm cells by synaptic junctions and were invaginated into the cel1. 
ISSN : 1110-5351 
Journal Name : Journal of the Egyptian Society of Parasitology 
Volume : 51 
Issue Number : 1 
Publishing Year : 1426 AH
2006 AD 
Article Type : Article 
Added Date : Monday, February 28, 2011 

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Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
اسامة ابو زنادةabu znadh, osama Researcher  

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