Seminal vesicle
Updates to Article Attributes
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The seminal vesicles are paired accessory sex glands of the male reproductive system. The seminal vesicle produces over two-thirds of the ejaculate and is very high in fructose.
Gross anatomy
The seminal vesicle is actually a 10-15 cm long tubular structure but is coiled tightly so it only measures 4-5 cm in length. It is located superiorly and posteriorly to the prostate.
The excretory duct of the seminal vesicle unites with the vasductus deferens to form the ejaculatory duct.
Relations
Blood supply
-
vesiculodeferential artery (also calledartery to the ductus deferens):from superior or inferior vesical arteries 3-4
Innervation
- sympathetic fibres from the testicular and hypogastric plexuses 4
Radiographic appearance
Ultrasound
- fluid-filled structure located posteriorly and superiorly to the prostate gland 2
CT
- has a typical "bow-tie" appearance and soft-tissue density; located between the prostate and the bladder 2, 5
- normally separated from the bladder by a fat plane
- normally are less than 1.5 cm in diameter, beyond that they can be considerd dilated 5
according to one publication the mean length was estimated to be around 3 cm with the mean width at around 1.5 cm 6
they may be larger in those with autosomal dominant polycystic kidney disease 7
MRI
- T1: low-to-intermediate signal
- T2: convoluted areas of high signal representing seminal fluid and low signal walls 5
Related pathology
-<p>The <strong>seminal vesicles</strong> are paired accessory sex glands of the <a href="/articles/male-reproductive-system">male reproductive system</a>. The seminal vesicle produces over two-thirds of the ejaculate and is very high in fructose. </p><h4>Gross anatomy</h4><p>The seminal vesicle is actually a 10-15 cm long tubular structure but is coiled tightly so it only measures 4-5 cm in length. It is located superiorly and posteriorly to the prostate.</p><p>The excretory duct of the seminal vesicle unites with the vas deferens to form the <a href="/articles/ejaculatory-duct">ejaculatory duct</a>. </p><h4>Relations</h4><ul>- +<p>The <strong>seminal vesicles</strong> are paired accessory sex glands of the <a href="/articles/male-reproductive-system">male reproductive system</a>. The seminal vesicle produces over two-thirds of the ejaculate and is very high in fructose. </p><h4>Gross anatomy</h4><p>The seminal vesicle is actually a 10-15 cm long tubular structure but is coiled tightly so it only measures 4-5 cm in length. It is located superiorly and posteriorly to the prostate.</p><p>The excretory duct of the seminal vesicle unites with the <a title="Ductus deferens" href="/articles/ductus-deferens">ductus deferens</a> to form the <a href="/articles/ejaculatory-duct">ejaculatory duct</a>. </p><h4>Relations</h4><ul>
-</ul><h4>Blood supply</h4><ul><li>vesiculodeferential artery (also called <a href="/articles/artery-to-the-ductus-deferens">artery to the ductus deferens</a>): from <a href="/articles/superior-vesical-artery-1">superior</a> or <a href="/articles/inferior-vesical-artery">inferior vesical arteries</a> <sup>3-4</sup>- +</ul><h4>Blood supply</h4><ul><li>
- +<a href="/articles/artery-to-the-ductus-deferens">artery to the ductus deferens</a> from <a href="/articles/superior-vesical-artery-1">superior</a> or <a href="/articles/inferior-vesical-artery">inferior vesical arteries</a> <sup>3-4</sup>
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