Semen vs sperm, what are the differences between semen and sperm? So, the point to bear in mind is that the sperm is present in the semen. The sperm occupies about 1% of the total seminal volume. The seminal volume is contributed mainly by the prostate, seminal vesicles, cowpers gland and lastly testicular fluid. Most people look at their semen, and form an opinion about color changes and in general changes about its consistency…Read more