Bulbourethral Gland -

: It lubricates the penile urethra and the glans penis, facilitating smoother passage for semen.

The , also commonly referred to as Cowper's gland , is a vital accessory organ of the male reproductive system, primarily responsible for the lubrication and chemical neutralization of the urethra prior to ejaculation. Though relatively small in size—often compared to a pea—these paired exocrine glands play a disproportionately significant role in ensuring the survival and motility of sperm as they travel through the male and female reproductive tracts. Anatomical Structure and Location bulbourethral gland

: Because the male urethra is also used for urination, it is naturally acidic. The alkalinity of the bulbourethral secretion neutralizes these acidic urine residues, protecting sperm from damage. Contribution to Reproductive Success : It lubricates the penile urethra and the

Beyond basic lubrication, recent research suggests these glands contribute specialized proteins to the seminal plasma that may modulate immune responses. For instance, certain proteins highly expressed in the bulbourethral glands, such as CRISP3, are positively correlated with fertility and may help regulate the female reproductive tract's immune system to favor fertilization. If these glands fail to function, the lack of proper neutralization and lubrication significantly impairs reproductive efficiency. Accessory Glands - SEER Training Modules Anatomical Structure and Location : Because the male