TESTIS a pair in scrotum Capsule: tunica vaginalis, albuginea and vasculosa, mediastinum testis septulum testis into 250 testicular lobules Seminiferous Tubule producing sperm a Testicular Interstitium producing androgens by Leydig ce∥ 11 2021/2/21
11 2021/2/21 TESTIS a pair in scrotum ◼ Capsule: tunica vaginalis, albuginea and vasculosa, mediastinum testis & septulum testis into 250 testicular lobules ◼ Seminiferous Tubule producing sperm ◼ Testicular Interstitium producing androgens by Leydig cell
2021/2/21
12 2021/2/21
Seminiferous Tubules Spermatogenic Cells spermatogonia primary spermatocyte secondary spermatocyte spermatid testicular sperm Sertoli Cell 13 2021/2/21
13 2021/2/21 Seminiferous Tubules ◼ Spermatogenic Cells - spermatogonia - primary spermatocyte - secondary spermatocyte - spermatid - testicular sperm ◼ Sertoli Cell
晚期精子细胞 早期精子细胞 胞质桥 支持细胞 次级精母细胞 初级精母 细胞 精 细 原胞 毛细血管 间质细胞 肌样细胞 基膜 14 2021/2/21
14 2021/2/21
Spermatogenesis a Stage 1 spermatogonia mitosis 5) a Stage 2 spermatocyte meiosis (2) Stage 3: spermiogenesis round spermatid elongated spermatid testicular sperm ( no motility no fertilizing capability 15 2021/2/21
15 2021/2/21 Spermatogenesis ◼ Stage 1 : spermatogonia mitosis (5) ◼ Stage 2 : spermatocyte meiosis (2) ◼ Stage 3 : spermiogenesis - round spermatid - elongated spermatid - testicular sperm ( no motility, no fertilizing capability)