1 — Male urethra; 2 — Seminal colliculus; 3 — Anterior region (non-glandular); 4 — Transitional zone; 5 — Ampulla of ductus deferens; 6 — Seminal gland; Seminal vesicle; 7 — Ejaculatory duct; 8 — Peripheral zone; 9 — Central zone
1 — Male urethra; 2 — Seminal colliculus; 3 — Anterior region (non-glandular); 4 — Transitional zone; 5 — Ampulla of ductus deferens; 6 — Seminal gland; Seminal vesicle; 7 — Ejaculatory duct; 8 — Peripheral zone; 9 — Central zone