Accessory reproductive organs of males: The

seminal vesicles, prostate gland, ' and bulbourethral glands are the male reproductive system's accessory glands. These glands secrete fluids, which enter the urethra.

Seminal vesicles: Seminal vesicles are also known as vesicular glands. They are single pair of two convoluted tubular glands.

In some male mammals they are found behind the urinary bladder. Prostate glands:

It mainly creates slightly alkaline fluid.

That fluid is one of the major components of semen. Bulbourethral glands:

It is pea-sized glands commonly called as Cowper's Gland.

It produces the fluid known as Cowper's fluid, which neutralizes the acidity of the urethra.