The Vesiculæ Seminales

From WikiMD's Wellnesspedia

Anatomy > Gray's Anatomy of the Human Body > XI. Splanchnology > 3c. 3. The Vesiculæ Seminales

Henry Gray (1821–1865).  Anatomy of the Human Body.  1918.

Vesiculae seminalis
Vesiculae seminalis

The Vesiculæ Seminales

Seminal Vesicles

The vesiculæ seminales (See figure) are two lobulated membranous pouches, placed between the fundus of the bladder and the rectum, serving as reservoirs for the semen, and secreting a fluid to be added to the secretion of the testes. Each sac is somewhat pyramidal in form, the broad end being directed backward, upward and lateralward. It is usually about 7.5 cm. long, but varies in size, not only in different individuals, but also in the same individual on the two sides.

The anterior surface is in contact with the fundus of the bladder, extending from near the termination of the ureter to the base of the prostate.

The posterior surface rests upon the rectum, from which it is separated by the rectovesical fascia.

The upper extremities of the two vesicles diverge from each other, and are in relation with the ductus deferentes and the terminations of the ureters, and are partly covered by peritoneum.

The lower extremities are pointed, and converge toward the base of the prostate, where each joins with the corresponding ductus deferens to form the ejaculatory duct. Along the medial margin of each vesicle runs the ampulla of the ductus deferens.

Each vesicle consists of a single tube, coiled upon itself, and giving off several irregular cecal diverticula; the separate coils, as well as the diverticula, are connected together by fibrous tissue.

When uncoiled, the tube is about the diameter of a quill, and varies in length from 10 to 15 cm.; it ends posteriorly in a cul-de-sac; its anterior extremity becomes constricted into a narrow straight duct, which joins with the corresponding ductus deferens to form the ejaculatory duct.

Structure—The vesiculæ seminales are composed of three coats: an external or areolar coat a middle or muscular coat thinner than in the ductus deferens and arranged in two layers, an outer longitudinal and inner circular; an internal or mucous coat which is pale, of a whitish brown color, and presents a delicate reticular structure. The epithelium is columnar, and in the diverticula goblet cells are present, the secretion of which increases the bulk of the seminal fluid.

Vessels and Nerves—The arteries supplying the vesiculæ seminales are derived from the middle and inferior vesical and middle hemorrhoidal. The veins and lymphatics accompany the arteries. The nerves are derived from the pelvic plexuses.

Gray's Anatomy[edit source]

Anatomy atlases (external)[edit source]

[1] - Anatomy Atlases

The Vesiculæ Seminales Resources

Find a healthcare provider anywhere in the world quickly and easily!

Translate to: East Asian 中文, 日本, 한국어, South Asian हिन्दी, Urdu, বাংলা, తెలుగు, தமிழ், ಕನ್ನಡ,
Southeast Asian Indonesian, Vietnamese, Thai, မြန်မာဘာသာ, European español, Deutsch, français, русский, português do Brasil, Italian, polski

WikiMD.png


WikiMD is the world's largest, free medical and wellness encyclopedia edited only by professionals. Advertise!



Wiki.png

Navigation: Wellness - Encyclopedia - Health topics - Disease Index‏‎ - Drugs - World Directory - Gray's Anatomy - Keto diet - Recipes

Search WikiMD


Ad.Tired of being Overweight? Try W8MD's physician weight loss program.
Semaglutide (Ozempic / Wegovy and Tirzepatide (Mounjaro) available.
Advertise on WikiMD

WikiMD is not a substitute for professional medical advice. See full disclaimer.

Credits:Most images are courtesy of Wikimedia commons, and templates Wikipedia, licensed under CC BY SA or similar.


Contributors: Prab R. Tumpati, MD