Microanatomical study of testis in juvenile ostrich (Struthio camelus)

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• 作者：Belal Hassanzadeh (1)
  Abolghasem Nabipour (1)
  Morteza Behnam Rassouli (2)
  Hesam Dehghani (1) (3)
  
• 关键词：Ostrich ; Microanatomy ; Tunica albuginea ; Rete testis ; Leydig cells ; Sertoli cells ; Myoid cells
• 刊名：Anatomical Science International
• 出版年：2013
• 出版时间：June 2013
• 年：2013
• 卷：88
• 期：3
• 页码：134-140
• 全文大小：662KB
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• 作者单位：Belal Hassanzadeh (1)
  Abolghasem Nabipour (1)
  Morteza Behnam Rassouli (2)
  Hesam Dehghani (1) (3)
  
  1. Department of Basic Science, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran
  2. Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
  3. Embryonic and Stem Cell Biology and Biotechnology Research Group, Research Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran
  

文摘

The majority of investigations on the testis, as the main organ of male reproductive system, have been performed in mammalian species, with few studies on bird species. Thus, the structure of the ostrich testis remains largely unknown. The aim of this study was to investigate the microanatomical characteristics of the testis in five juvenile ostriches. A stereological study was performed according to the Delesse principle. The mean volume fraction of the seminiferous tubules was 0.569, and the mean volume of the seminiferous tubules in an average testis was 1.04?cm3. The Paraffin-embedded sections were stained with hematoxylin and eosin, Masson’s trichrome, Alcian blue, and periodic acid–Schiff stains. Histological studies revealed that the spermatogonial stem cells and Sertoli cells were localized inside the seminiferous tubules, close to the basement membrane. Inside the tubules a few meiotic cells up to the spermatozoa stage were located in a centripetal manner. Outside the tubules, one to three layers of euchromatic peritubular myoid cells were present, surrounded by loose interstitial connective tissue. A thick tunica albuginea contained many myoid cells and some rete ducts, with the latter extending from the hilus to the free surface of the testis. Straight seminiferous tubules were distributed in the lateral surfaces and hilar portions of the capsule but were rare in the free surface. These capsular rete ducts may participate in testicular fluid transit from the distal tubules through the capsule.