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男生殖系ppt課件-展示頁

2025-05-11 07:51本頁面
  

【正文】 ous tubules tunica albuginea tunica vasculosa 青春期前的生精小管 (一)生精小管 seminiferous tubule (青春期 ) 生精小管 spermatogenic epithelium, basal membrane, myoid cell (肌樣細(xì)胞 ) 生精上皮 ,spermatogenic epithelium 由支持細(xì)胞和 生精細(xì)胞組成。 生精細(xì)胞: ?精原細(xì)胞 , spermatogonium ?初級精母細(xì)胞 , primary spermatocyte ?次級精母細(xì)胞 , secondary spermatocyte ?精子細(xì)胞 , spermatid ?精子 , spermatozoon 精子發(fā)生 (spermatogenesis) 分三個時期 : : A型精原細(xì)胞 A型精原細(xì)胞 (干細(xì)胞儲備 ) A型精原細(xì)胞 B型精原細(xì)胞 : 初級精母細(xì)胞 次級精母細(xì)胞 精子細(xì)胞 : spermiogenesis 精子 細(xì)胞間橋 Type A: Ad(dark typeA), Ap(pale typeA), Type B: 精原細(xì)胞, spermatogonium , diploid(2n) of DNA 初級精母細(xì)胞, primary spermatocyte Frequently visible Largest cell Flocculuslike絨球樣 nucleus 46 chromosomes and tetraploid(4n) of DNA 1. Difficult to observe, shortlived cell 2. Situated adjacent to the lumen , Smaller in size, Spherical nucleus, 3. 23 chromosomes and
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