大鼠睾丸生精细胞发育的形态学研究  

MORPHOLOGICAL STUCIES ON THE DEVELOPMENT OF GERM CELLS OF RAT TESTIS

作　　者：刘慧雯[1] 李村[1] 金连弘[1] 刘芷余[1] 李学均[1] 

机构地区：[1]哈尔滨医科大学组织学与胚胎学教研室,哈尔滨医科大学附属第二医院神经科,哈尔滨医科大学计算机中心

出　　处：《解剖学报》1996年第2期216-220,共5页Acta Anatomica Sinica

摘　　要：对７０例不同发育阶段（胚胎不同时期、新生期、未成熟期和成熟期）Ｗｉｓｔａｒ大鼠睾丸生殖细胞的发育进行了光镜和电镜研究。结果：１．根据时间、分布及形态结构等将生精细胞的发育过程初步分为原始生殖细胞、生殖母细胞、前精原细胞、早期精子发生及精子发生等５个阶段。２．胚胎１３ｄ原始生殖细胞间即可见到胞质桥前身；胚胎１９ｄ生殖母细胞间的胞质桥已明显且较多。说明雄性生殖细胞的胞质桥在精原细胞以前就已出现。３．自胚胎１７ｄ在生殖细胞和支持细胞间见到大量不典型的细胞连接。这种连接在以后各时期均可见到。除可能具有机械性连接作用外，可能尚有输送营养和传递信息的作用。Germ cell development in 70 samples of Wistar art testis from day 11 of gestation to maturity was observed by light and electron microscopy,Based on the time,distribution and morphology,the development of germ cells may be divided into 5 periods:primordial germ cells,genocytes,prespermatcogonia,early spermatogenesis and spermatogenesis. Predecessor of cytoplasmic bridges can be observed among primordial germ cells on the 13rd day of gestation,and cytoplasmic bridges of among genocytes formed on the 19th day of gestation. It appears earlier than that in spermatogonia. Special cell junctions appeared between germ cells and Sertoli cells beginning from the 17th day of gestation. They are desmosome-like,intermediate-like or tight-like junctions,Degenerated germ cells are observable in allperiods of development,however there are two peaks of degeneration at 15th to 17th days of gestation and during the 4th week after birth.

关 键 词：生殖细胞 发育 超微结构 大鼠 睾丸 

分 类 号：R321.1[医药卫生—人体解剖和组织胚胎学] R339.21[医药卫生—基础医学]