The vas deferens ( plural : vasa deferentia ) , also called ductus deferens ( Latin : `` carrying-away vessel '' ; plural : ductus deferentes ) , is part of the male anatomy of many vertebrates ; these vasa transport sperm from the epididymis to the ejaculatory ducts in anticipation of ejaculation .
The vas deferens is also called the ductus deferens , ( Latin : `` carrying-away vessel '' ) .