Testes to urethra. the path that sperm take begins in the testis and ends in the urethra. what three structures form a transportation system for the sperm as it begins its travels from the testes? a) epididymis, vas deferens, ejaculatory ducts b) prostate, seminal vesicles, ejaculatory ducts c) vas deferens, ejaculatory ducts, seminal vesicles d) seminal vesicles, the prostate, bulbourethral glands.