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Seminal vesicle (which is exactly what it sounds like)

Okay, so here's something that will blow your mind: the urinary and reproductive systems converge in the male body. In the male system, urine and ejaculate exit the same duct, the urethra, while in the female system they have their own distinctive exits. I explained this to a friend of mine once and she spent the rest of our otherwise mundane conversation with a look on her face that said she wasn't sure what else in her life was a lie. The male reproductive system has two seminal vesicles, which are sacs, basically. Each ~7.5 cm sac is lined with a mucous membrane, and the cells within the membrane secrete a pale fluid containing sugars, prostaglandins, and other substances. This fluid…

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Articles of Interest

Seminal Vesicles

The seminal vesicles were described by the Italian anatomist Berengario a Carpi in 1521. These paired androgen-dependent accessory sex glands were first regarded simply as storage sites for semen, but their milky alkaline secretions are now known to constitute the majority of the ejaculate, promoting sperm function and providing a variety of potent antibacterial factors to the male genital tract. Cross-sectional area increases with duration of abstinence from ejaculation. Infections, cysts, and neoplasms of the seminal vesicles are rare, in sharp contrast with their anatomic neighbor, the prostate.

Seminal vesicles - an overlooked pair of accessory glands in male sexual dysfunction: a narrative review

The seminal vesicles (SVs) have long been recognized for their role in male fertility, yet their contribution to male sexual function is often underestimated. In recent decades, studies have gradually unveiled an association between SVs and various male sexual dysfunctions (SDs), including diminished libido, erectile dysfunction, premature ejaculation, delayed ejaculation, and orgasmic disorder

Seminal work

It’s a strange place to call home, but seminal fluid offers the perfect environment for particular types of bacteria. Researchers at MU’s Bond Life Sciences Center recently identified new bacteria that thrive here.

Vesicula Seminalis: What is it, Functions, Disorders

The seminal vesicles are located in the pelvis, specifically behind the bladder and above the prostate gland. They are paired structures, meaning there are two of them—one on each side of the midline. The seminal vesicles are positioned close to the base of the bladder and are connected to the vas deferens, which is the duct that carries sperm from the testes to the urethra. The best radiologic imaging modality for visualizing the seminal vesicles is typically magnetic resonance imaging (MRI) or transrectal ultrasound (TRUS).

What happens to seminal vesicles after ejaculation?

Seminal vesicle fluid volume significantly increased from day 1 to day 3 post-ejaculation.

Resources

KenHub

The seminal vesicles are accessory glands of the male reproductive system. They are a pair of contorted or twisted tubes, which are located between the bladder and the rectum. At puberty, the seminal vesicles form sacs and contribute up to 65-75% of the seminal fluid. Unlike what their name suggests, the seminal vesicles are not involved in the storage of spermatozoa.

Radiopedia

The seminal vesicles are paired accessory sex glands of the male reproductive system. They produce seminal fluid that, together with sperm cells from the testicles, comprise the male ejaculate. Seminal fluid is rich in fructose which is essential for sperm cell survival.

StatPearls

The seminal vesicles are located in the pelvis superior to the rectum, inferior to the fundus of the bladder and posterior to the prostate. Like the prostate, they are separated from the rectum by Denonvillier's fascia. Each seminal vesicle lies lateral to an ampullae of the vas deferens, a seminal vesicle ultimately converging with an ampullae to form the ejaculatory duct. These two ejaculatory ducts open into the prostatic urethra at the verumontanum, either side of the utricle.

Teachme Anatomy

The secretions of the seminal gland have a key role in the normal functioning of semen, making up 70% of its total volume. It is notable however that the first fractions of expelled semen contain mainly spermatozoa and prostatic secretions; the fluids from the seminal vesicles are included in the late ejaculate fractions.