Bulbourethral gland Flashcards
what is the function of the bulburothelial gland
During sexual arousal, the bulbourethral glands produce a mucus secretion containing glycoproteins. This substance has three main purposes:
Serves as lubrication medium for the urethra and the tip of the penis.
Expels any residue of urine, dead cells or mucous through the urethral meatus, preparing a clean and lubricated pathway for ejaculation.
Helps to neutralise residual acidity in the male urethra (secretions are alkaline).
It is apparent that normally this secretions are devoid of any spermatozoa, as ejaculation occurs further down at the prostatic urethra level. However, occasionally these secretions (also known as pre-ejaculate) may carry spermatozoa that remain in the urethra after a previous ejaculation (keep in mind that spermatozoa in body temperature survive for more than 48 hours!).
This may be obviated by urination and thus washing out the urethra. However, although rare, it may represent a cause of unintended pregnancy during unprotected second intercourse
embroyology of the bulburothelial glands
Embryologically the bulbourethral glands are derived from the urogenital sinus, along with the bladder, prostate and urethra. Their development is greatly influenced by DHT (dihydrotestosterone).
anatomical position of the bu gland
On dissection, the bulbourethral glands can be found in the deep perineal pouch of the male. They are situated posterolaterally to the membranous urethra and superiorly to the bulb of the penis.
structure of the bu gland
The ducts of the gland penetrate the perineal membrane alongside the membranous urethra and open into the proximal portion of the spongy urethra.
The glands themselves can be described as compound tubulo-alveolar glands lined by columnar epithelium.
what are the bu glands
are a pair of pea shaped exocrine glands located posterolateral to the membranous urethra. They contribute to the final volume of semen by producing a lubricating mucus secretion.
