The prostate gland is part of the male reproductive system that is responsible for producing twenty percent of the fluid containing semen. This fluid helps protect sperm from the vagina's acidity during ejaculation. This walnut shaped gland is situated under the bladder and in front of the rectum.

The urethra coming from the bladder runs through the prostate gland .The male urethra has two functions: to carry urine from the bladder during urination and to carry semen during ejaculation.
Because of its location, if the prostate gland becomes enlarged, it can create bothersome urinary problems.
Fig 1 Male Reproductive System