Testis Parts A diagram of the major components of an adult human testicle, including the following numbered items: 1. Tunica albuginea, 2. Septula testis, 3. Lobulus testis, 4. Mediastinum testis, 5. Tubuli seminiferi contorti, 6. Tubuli seminiferi recti, 7. Rete testis, 8. Ductuli efferentes testis, 9a. Head of epididymis, 9b. Body of epididymis, 9.c Tail of epididymis,10. Vas deferens, 11a. Tunica vaginalis (parietal lamina), 11b. Tunica vaginalis (visceral lamina), and 12. Cavity of tunica vaginalis.Courtesy KDS444 Seminiferous Tubules Germ Cells Sertoli Cells Lobules Rete Testis Mediastinum Testis Efferent Ductule Epididymis Vas Deferens Tunica Albuginea Tunica Vaginalis Cremaster Muscle Spermatic Cord Arteries Veins