part of contributes to morphology of channel for channels_from channels_into tube ejaculatory duct vas deferens Wikipedia:Vas_deferens NCIT:C12813 vasa deferentia EMAPA:18681 FMA:19234 VHOG:0001135 EFO:0000981 BTO:0001427 A secretory duct that transports sperm from the testis. In mammals this is a continuation of the epididymis and ends in the prostatic urethra where it terminates to form ejaculatory duct. vas deferen GAID:404 SCTID:245467009 MESH:D014649 CALOHA:TS-1105 galen:VasDeferens MA:0000413 MIAA:0000129 sperm duct EV:0100105 deferent duct ductus deferens epididymis semen internal male genitalia spermatic cord duct of male reproductive system male genital duct