What happens if the vas deferens of a man is surgically disconnected?
Sperms are produced in the testes within a network of highly coiled structures called seminiferous tubules (ST). Semen travels from seminiferous tubules to the network of accessory ducts such as (Rete testis, vasa efferentia, vas deferens, etc) before reaching the ejaculatory ducts. On surgically removing the vas deferens, sperms will not be able to be a part of seminal fluid.
The sperm consists of three parts: Head, middle piece and tail. The head contains the nucleus that holds the genetic information of one parent (father) in haploid condition.
Spermatogenesis is the process of origin and development of spermatozoa (sperm cells) in the seminiferous tubules of the testis. Spermatogonial stem cells undergoe repeated division for the formation of male gametes i.e., sperm cells.
Asthenozoospermia is the condition in which sperm cells lose the property of being motile (100% asthenozoospermia means all sperms are completely non-motile) which does not occur due to the blockage of vas deferens. The final maturation of sperm occurs in the epididymis, where the cells gain the ability to move. They gain the ability to fertilise the egg through the process of capacitation , which occurs in the female reproductive tract.