What are the seminal vesicles and what is their primary function?

The seminal vesicles are paired coiled tubular glands located at the base of the urinary bladder. Their primary function is to contribute a significant portion of seminal fluid, which is slightly alkaline and contains nutrients like fructose to energize sperm, but they do not store sperm.

Where are the seminal vesicles located in the male pelvis?

They are situated extraperitoneally at the base of the urinary bladder, lateral to the vas deferens, and anterior to the rectum.

How are the ejaculatory ducts formed and what is their pathway?

Each ejaculatory duct is formed by the union of the duct of the seminal vesicle with the ampulla of the vas deferens. They pass anteroinferiorly through the prostate and open into the prostatic urethra on the seminal colliculus.

What substances are secreted by the seminal vesicles and why are they important?

The seminal vesicles secrete a slightly alkaline fluid containing fructose (an energy source for sperm), choline, and vesiculase (a coagulating enzyme). These components support sperm function and seminal fluid properties.

What is the clinical significance of fructose in seminal fluid?

Fructose in seminal fluid is exclusive to the seminal vesicles, making its detection useful in forensic evidence for cases like rape. This helps confirm the presence of seminal fluid.

What is the Florence test and how is it used clinically?

The Florence test identifies choline crystals in seminal fluid. It is used clinically to confirm the presence of seminal fluid, aiding in forensic or diagnostic assessments.

Do the seminal vesicles store sperm?

No, the seminal vesicles do not store sperm. Their role is solely to produce and secrete seminal fluid components that support sperm after ejaculation.

Seminal Vesicles & Ejaculatory Ducts – Anatomy & Function

❓ Frequently Asked Questions