part_of part of part of duct male reproductive system reproductive system ejaculatory duct https://cdn.humanatlas.io/digital-objects/ref-organ/prostate-male/v1.2/assets/3d-vh-m-prostate.glb https://upload.wikimedia.org/wikipedia/commons/3/35/Male_anatomy.png UMLS:C0013747 The Ejaculatory ducts (ductus ejaculatorii) are paired structures in male anatomy, about 2 cm in length. Each ejaculatory duct is formed by the union of the vas deferens with the duct of the seminal vesicle. They pass through the prostate, and empty into the urethra at the Colliculus seminalis. During ejaculation, semen passes through the ducts and exits the body via the penis[WP,unvetted]. FMA:19325 ductus ejaculatorii EFO:0000985 EMAPA:19088 MA:0003247 CALOHA:TS-0211 SCTID:279665005 GAID:388 ductus ejaculatorius NCIT:C32493 ductus ejaculatorii MAT:0000170 BTO:0001580 UBERON:0000999 Wikipedia:Ejaculatory_duct MIAA:0000170 MESH:D004543