spermatozoa are transported from the vas deferens to the abdominal urethra during reproduction.
when are spermatozoa transported from the vas deferens to the abdominal urethra?
during reproduction
vas deferens





















































the vas deferens (latin: "carrying-away vessel"; plural: vasa deferentia), also called ductus deferens (latin: "carrying-away duct"; plural: ductus deferentes), is part of the male reproductive system of many vertebrates; these ducts transport sperm from the epididymis to the ejaculatory ducts in anticipation of ejaculation. it is a partially coiled tube which exits the abdominal cavity through the inguinal canal.





















































section::::structure.
vas deferens
a problem in the delicate tubes of epididymis can develop over time after vasectomy. the longer the time since the vasectomy, the greater the “back-pressure” behind the vasectomy. this “back-pressure” may cause a “blowout” in the delicate epididymal tubule, the weakest point in the system. the blowout may or may not cause symptoms, but will probably scar the epididymal tubule, thus blocking sperm flow at second point. to summarize, with time, a man with a vasectomy can develop a second obstruction deeper in the reproductive tract that can make the vasectomy more difficult to reverse. having the skill to detect and fix this problem during vasectomy reversal is the essence of a skilled surgeon. if the surgeon simply reconnects the two freshened ends of the vas deferens without examining for a second, deeper obstruction, then the procedure can fail, as sperm-containing fluids are still unable to flow to the place of the connection. in this case, the vas deferens must be connected to the epididymis in front of the second blockage, to bypass both blockages and allow the sperm to reenter the urethra in the ejaculate. since the epididymal tubule is much smaller (0.3 mm diameter) than the vas deferens (3 mm diameter, 10-fold larger), epididymal surgery is far more complicated and precise than the simple vas deferens-to-vas deferens connection.
vasectomy reversal