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The sequence events of spermatogenesis and spermiogenesis in adult Perdix (PerdixPerdix) | ||
| Almuthanna Journal of Pure Science (MJPS) | ||
| Article 1, Volume 2, Issue 1, 2014, Pages 0-0 | ||
| Author | ||
| Abstract | ||
| Someanatomical remarks of male reproductive system of adult perdix, histological structure of testes of perdix and the sequence events of spermatogenesis and spermiogenesis are dealed in this research. The anatomical study of the male reproductive system in perdix include: the paired testes which remain within the abdominal cavity and connect with the dorsal wall via mesorchium. The testes are covered by a thin tunica albuginea. The spermatic cord, tunica vaginalis, and scrotum are lacking. the seminiferous tubule has seminiferous epithelium; spermatogenic cells and sertoli cells lie on the basement membrane and that whole is circumscribed by interstitial tissue which contain leydig cells. The sequence events of spermatogenesis and spermiogenesis in seminiferous tubule of adult perdix start with spermatogonia. Three types of spermatogonia are present which include: A-spermatogonia, B-spermatogonia and Intermediate spermatogonia. The B-spermatogonia give rise to primary spermatocytes. The primary spermatocytes appear six different phases. Which are include: (preleptotene, leptotene, zygotene, pachytene, diplotene,anddiakinesis phases ). The secondary spermatocytes being short - living cells and are derived from the primary spermatocytes. With the appearance of spermatids, spermatocytogenesis end. The spermatids undergo complex processes of differentiation depending on changes in the acrosome and nuclei. These changes show 17 phases lead to form sperms. The sertoli cells possess elongated nuclei which are often triangular in shape. The sertoli cells form an extensive ramification around and between the germinal cells making intimate contact with them. A cycle of stages in sertoli cells structure are not identified. The leydig cells are scattered singly or in small groups and are chiefly found in the larger intertubular space. The basement membrane of convoluted seminiferous tubule is comprised of a layer of connective tissue and myoepithelial cells. The myoid cells are elongated cells, with oval nuclei, surrounded by a small amount of cytoplasm. | ||
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