Leydig cells Sertoli cells
Testosterone Inhibin
Spermatogenesis Seminiferous tubules Lumen Spermatogonia Spermatids Spermatozoa (sperm) Flagellum
Testis (pl. testes) Epididymis Vas deferens Ejaculatory duct Prostate gland Seminal vesicle Bulbourethral gland Urethra Penis Erectile tissue