The bulbourethral glands are located posterolateral to the membranous urethra and are situated below the prostate gland within the pelvic diaphragm. Each gland is connected to the proximal end of the penile urethra via a short excretory duct that passes through the spongy layer of the penis. Structurally, they are often described as compact with a smooth external surface, and their positioning serves as a critical topographic landmark in reproductive morphology.
: 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 bulbourethral gland
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 The bulbourethral glands are located posterolateral to the