Region: Viscera

Seminal Vesicles

Seminal Vesicles The structure indicated is the seminal vesicle. The seminal vesicles are paired accessory glands of the male reproductive system. The seminal vesicles lie lateral to the ductus deferens just beneath the bladder. The excretory duct of the seminal vesicles join the ipsilateral vas deferens to form the ejaculatory ducts. The ejaculatory ducts formed on either side then pass through the prostate to open into the prostatic urethra at the colliculus seminalis. The seminal vesicles contribute a significant volume of the fluid which forms semen. Learn about the basic anatomy and structure of the male reproductive system in this …

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Seminal Vesicle

Tunica Vaginalis

Tunica Vaginalis The structure indicated is the tunica vaginalis. The tunica vaginalis forms the serous covering of the testis, originating in embryological life from the processus vaginalis of the peritoneum (an embryonic outpouching of the peritoneum). In fetal life, the processus vaginalis precedes the descent of the testis into the scrotum from the abdomen and then closes off. The remaining part then becomes known as the tunica vaginalis which adheres to the surface of the testis and reflects back onto the internal aspect of the scrotum. It therefore consists of a visceral portion and a parietal portion. The visceral portion …

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Tunica Vaginalis