Osmosis video - Prostate gland histology

The prostate gland is a large and dense exocrine gland found in the male reproductive system, measuring approximately 3 x 3 x 5 cm. It surrounds the urethra and is responsible for producing a fluid that makes up a portion of semen. The prostate gland has four zones. There is the central zone surrounding the ejaculatory ducts; the peripheral zone surrounding the lateral and posterior sides of the central zone; the transitional zone which is the one to undergo hyperplasia benign prostatic hyperplasia; and the periurethral zone, a small zone surrounding the urethra.