Article overview vas deferens
- What is the vas deferens?
- What is the function of the vas deferens?
- Where is the vas deferens?
- What problems can the vas deferens cause?
What is the vas deferens?
The right and left vas deferens (singular: ductus deferens or vas deferens) are each 50 to 60 centimeters long aisle of about half a centimeter in diameter, which connect the testes / epididymis with the urinary tube. Each vas deferens begins at the lower end of the epididymis, where it is so tightly wound that its length to the mouth is only about 35 centimeters.To the table of contents
What is the function of the vas deferens?
The ductus deferens is a transport organ. He can aspirate the seeds, which are located in the epididymis (where they are stored for about twelve days) via a suction pump mechanism and then emptying into the urethral tube via a pressure pump mechanism.
This mechanism is made possible by the arrangement of smooth muscles in the wall of the two vas deferens: on the outside is a longitudinal, in the middle a ring and inside again a longitudinal muscle layer, which are arranged in a spiral system.
Thanks to this strong muscle wall, the diameter of the vas deferens in the area where it joins the duct of the seminal vesicle can be reduced. This reduction in the inner diameter results in the high pressure and high speed with which the seminal fluid during ejaculation in the urinary tube and further outwards.To the table of contents
Where is the vas deferens?
The right vas deferens from the right epididymis, the left vein deferens from the left epididymis. With its vessels and its shell, the spermatic cord, each vas deferens pulls up the back of the epididymis up to the outer inguinal ring, where it enters the abdominal cavity.
Here, each vas deferens before the bladder to an ampoule, in which the sperm are stored. A little further on, the paired seminal vesicle flows into the vas deferens, which produces the liquid part of the ejaculate. Finally, the two vas deferens cross the prostate gland and open into the urethra. In the further course one speaks then of the urine seed tube.To the table of contents
What problems can the vas deferens cause?
Some men have a congenital malformation of the vas deferens.
Tumors in the scrotum are at a low percentage of spermatic cord tumors, which are usually benign (rhabdomyosarcoma). They occur mainly in childhood and adolescence.
Spermatic sarcomas, on the other hand, are malignant tumors that grow into the surrounding tissue (infiltration) and form secondary tumors (metastases).
A spermatocele is a fluid-filled cavity (cyst), which usually originates from the epididymis, more rarely from the spermatic cord. It arises at the upper testicle pole. Specifically, it is a so-called retention cyst, so a cyst, which is caused by a drainage obstruction. It is filled with sperm and, if it gets bigger than a pinhead, can lead to a feeling of pressure.
External injuries may cause bleeding, bruising, or abscess (encapsulated pus) in the area of the ductus deferens.
As part of a prostate infection (prostatitis) or urinary tract infection may also be the paired vas deferens ignite.