Seminiferous tubules Anhui Medical University Germinal or seminiferous epithelium Supporting or Sertoli cells Spermatogenic cells Basement membrane Tunica propria and myoid cell (3-5 layers
Anhui Medical University Seminiferous tubules Anhui Medical University Supporting or Sertoli cells Spermatogenic cells Basement membrane Tunica propria and myoid cell (3-5 layers ) Germinal or seminiferous epithelium
Anhui Medical University 1、spermatogenic cell They are arranged in 4-8 layers since puberty.The cells replicate and migrate from the basal region of the seminiferous tubule to lumen as they mature. Sperm Spermatid 1)Spermatogonium Intercellular cytoplas mic bridge Secondary spermatocytes (a primitive germ cell) Pnmary sper matocytes 2)Primary spermatocyte Supporting cell Spermato- gonium 3)Secondary spermatocyte Leydig cell 4)Spermatid 5)Sperm(spermatozoa) Myoid cell Basement mem Capillary brane
Anhui Medical University Anhui Medical University 1、spermatogenic cell They are arranged in 4-8 layers since puberty. The cells replicate and migrate from the basal region of the seminiferous tubule to lumen as they mature. 1）Spermatogonium (a primitive germ cell) 2）Primary spermatocyte 3）Secondary spermatocyte 4）Spermatid 5）Sperm (spermatozoa)
Anhui Medical University 1 )Spermatogonium Adjacent to the basal membrane Round or ellipsoid,small (10-12 um)
Anhui Medical University Anhui Medical University Adjacent to the basal membrane Round or ellipsoid, small (10-12 µm) 1）Spermatogonium
Anhui Medical University 1)Spermatogonium Structure:Is a relatively small cell,about 12 micrometer in diameter;round nucleus,deep stained by HE staining;situated next to the basement membrane Sperm Spermatid mic bridge Secondary spermatocytes Primary sper- matocytes Supporting cell Spermato. gonium Leydig Myoid cell Basement mem- Capillary brane
Anhui Medical University Anhui Medical University 1）Spermatogonium Structure：Is a relatively small cell, about 12 micrometer in diameter; round nucleus, deep stained by HE staining; situated next to the basement membrane
Classification Anhui Medical University type A: dark typeA(Ad):ovoid,deep-stained,nucleus,stem cell Pale type A(Ap):ovoid,pale-stained,nucleus,differentiate into type B. P1 type B:round Nucleus,chromatin granules are distributed under nucleus membrane,division and differentiate into primary spermatocvte
Anhui Medical University Classification ： Anhui Medical University type A: dark typeA(Ad):ovoid,deep-stained,nucleus,stem cell Pale type A(Ap)：ovoid, pale-stained,nucleus, differentiate into type B. type B：round Nucleus, chromatin granules are distributed under nucleus membrane, division and differentiate into primary spermatocyte A p B A d