Electron-microscopic studies on the spermiogenesis and the spermatozoa of the domestic fowl
1987
Bae, D.S. | Kim, J.W. (Chungbuk National Univ., Chongju (Korea R.). Coll. of Agriculture)
Testes from the domestic fowl have been examined by the electron microscopy in thin sections in order to observe the spermiogenesis and the structure of spermatozoa. The spermiogenesis can be divided into three stages: early spermatid, nuclear elongation, and matured spermatid. The inner membrane of mitochondria shows a markedly increased thickness compared to the outer membrane during the final steps of the spermiogenesis. The distal centriole composed of cylindrically shaped wall has been observed since the nuclear elongation stage. There are two cross sections of the nucleus in one spermatid cell owing to the curved long head. The acrosome of the matured spermatozoa is composed of the acrosomal cap and the acrosomal spine and there is no fibrous sheath around the axial filament complex in the principal piece
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