What is the Origin of Seminal Vesicles?

The term derives from the Latin semin (seed) and vesicula (small bladder or sac), literally describing the sac-like structures that store and contribute to the seminal fluid. Anatomical knowledge of these accessory glands dates back centuries, but their precise physiological role and dependence on endocrine signaling have been clarified through modern endocrinology. They are a classic example of a hormone-dependent target organ in the male system.

What is the Mechanism of Seminal Vesicles?

The mechanism of secretion is governed by the circulating levels of testosterone, which binds to androgen receptors within the epithelial cells of the seminal vesicles, driving the transcription of genes responsible for synthesizing the various fluid components. Fructose is synthesized and released under this hormonal influence, providing the necessary metabolic fuel for the spermatozoa during their journey. The fluid's alkaline nature also helps to neutralize the acidic environment of the female reproductive tract, enhancing sperm survival and mobility.

Seminal Vesicles ∞ Area

Seminal Vesicles

Meaning

The seminal vesicles are a pair of glandular organs in the male reproductive system situated posterior to the urinary bladder, responsible for producing a significant portion of the fluid component of semen. These glands secrete a viscous, yellowish fluid rich in fructose, which serves as the primary energy source for sperm motility, along with prostaglandins and clotting factors. The functional activity and secretory output of the seminal vesicles are directly dependent upon adequate androgenic stimulation, particularly from testosterone. Their health is an important indicator of overall male hormonal and reproductive vitality.