Linked from
The 9 pages that link to Seminal vesicle, each with the reason it gives.
Semen analysisRelated: Its secretions contribute substantially to the measured ejaculate volume.
EjaculationRelated: Its secretions supply a major share of the fluid expelled.
ProstateRelated: Its secretion combines with prostatic fluid to form seminal fluid.
Vas deferensRelated: Its duct joins the vas deferens to form the ejaculatory duct.