The Ductus Deferens is also termed as the vas deferens and it forms part of the male reproductive system of humans as well as some kinds of species. There are a couple of ducts that can be found in it which are all muscular tubes that are surrounded by smooth muscles. It connects to the right and left epididymis and moves sperm by way of the ejaculatory ducts. In humans, each of the tubes is around thirty centimeters in length.
The Ductus deferens is part of the spermatic cords. When ejaculation occurs, the smooth muscle that is on the walls of the vas deferens contract by reflex. This action allows the sperm to be propelled forward, and this process is called peristalsis. From the vas deferens, the sperm is transferred to the urethra. Where the other secretions form, the accessory sex glands of the male reproductive system are collected. These accessory glands include the bulbourethral glands and the prostate gland, and their secretions compose the bulk of the semen.
It is the vas deferens that is cut during the medical procedure called deferentectomy. It is a kind of contraception method in which the tubes are severed permanently; although there are cases where it can still be reconnected. The process is more commonly known as vasectomy, although the term actually refers to a modern variation of the procedure in which the vas deferens is not severed, but is injected with a material that obstructs the flow of sperm. Recent focus on male contraception is on the use of an intra vas device and RISUG or Reversible Inhibition of Sperm Under Guidance. Blood is supplied to the Ductus deferens by an artery. The artery usually branches out of the superior vesical artery which, in turn, arises from the inner iliac artery.