The seminal vesicles (Latin: glandulae vesiculosae), vesicular glands, or seminal glands, are a pair of simple tubular glands posteroinferior to the urinary bladder of some male mammals. Seminal vesicles are located within the pelvis. They secrete fluid that partly composes the semen.Low magnification micrograph of seminal vesicle. H&E stain.High magnification micrograph of seminal vesicle. H&E stain.Seminal vesicles seen on axial MRI scanSeminal vesicles seen on axial MRI scanHuman male reproductive system.Seminal vesiclesCoronal section of pelvis, showing arrangement of fasciae. Viewed from behind.Male pelvic organs seen from right side.Fundus of the bladder with the vesiculae seminales.Vesiculae seminales and ampullae of ductus deferentes, seen from the front.Vertical section of bladder, penis, and urethra.Cross section of seminal vesicle through a microscope. The seminal vesicles (Latin: glandulae vesiculosae), vesicular glands, or seminal glands, are a pair of simple tubular glands posteroinferior to the urinary bladder of some male mammals. Seminal vesicles are located within the pelvis. They secrete fluid that partly composes the semen. The seminal vesicles are a pair of glands that are positioned below the urinary bladder and lateral to the vas deferens. Each vesicle consists of a single tube folded and coiled on itself, with occasional diverticula in its wall. The excretory duct of each seminal gland unites with the corresponding vas deferens to form the two ejaculatory ducts, which immediately pass through the substance of the prostate gland before opening separately into the verumontanum of the prostatic urethra.