男生殖系--组织学和胚胎学.pptVIP

Male reproductive system. Female reproductive system. sperm Interstitial C * * Reproductive system testis Genital excurrent ducts Accessory sex glands penis bladder Ductus deferens epididymis testis Tunica vaginalis Corpus cavernosum Corpus spongiosum Seminiferous tubule Straight tubule Rete testis Efferent ductule Ductus epididymis Seminal vesicle prostate Bulbourethral gland summary tunica albuginea→septum lobules of testis in each lobule, consist of seminiferous tubules. CT stroma , contains interstitial cells . 一、testis Testis epididymis （一）seminiferous tubule seminiferous epithelium Supporting cells/ sertoli cells Spermatogenic cells Seminiferous tubule spermatogonium Basal lamina Primary spermatocyte Sertoli C spermatid 1.Spermatogenic cells spermatogonium primary spermatocyte secondary spermatocyte spermatid spermatozoa spermatogenesis location: closely attach to basal lamina of spermatogenic Epi. round，organells poorly-developed differentiate into primary spermatocyte （1）spermatogonium A型 B型 spermatogonia （2）primary spermatocyte attach to the luminal surface of the spermatogonia. large. after 1 st meiotic division，produce 2 secondary spermatocyte。 Primary spermatocytes （3）secondary spermatocyte Not easy to be seen in section. After the second meiotic division，form 2 spermatids. （4）spermatid adjoining to the lumen. No division，undergo extensive cell remodeling , as they differentiate into sperm. this process is called spermiogenesis。 （5）sperm Shaped pollywog，divide into head sperm tail sperm。 head: nucleus+acrosome。 In acrosome, variant acrosomal enzymes. tail: motile equipment . sperm 2. supporting C Sertoli C. stained lightly，nucleulus is obvious。 sides with tightly junction. support , nutrient spermatogenic cells. Supporting C Blood-seminiferous tubule barrier： The structure , prevent large molecular substances exchange between the blood and the seminiferous tubule. costituents：endothelium basa