Which gland is responsible for producing seminal fluid in males?

The Cowper's gland, also known as the bulbourethral gland, plays a significant role in male reproductive physiology by producing a pre-ejaculatory fluid that helps to lubricate the urethra and neutralize acidity in the urinary tract, creating a more hospitable environment for sperm. This secretion is considered a component of seminal fluid, which is crucial for sperm health and transportation during ejaculation.

While the prostate gland also contributes to the seminal fluid by producing a significant portion of the fluid that carries sperm, the Cowper's gland's specific function in providing lubrication and protecting sperm on its journey distinguishes it within the reproductive system. The thyroid gland does not have a role in fluid production related to reproduction, as it primarily regulates metabolism and hormonal functions. The adrenal gland is involved in producing hormones like adrenaline and cortisol, which are important for stress responses and metabolism, but it does not directly relate to the production of seminal fluid.