For many years, the prostate has been anatomically divided into five lobes: anterior, middle, posterior and two lateral lobes. However, there are no clear boundaries between the lobes as seen by the naked eye. Recent studies have revealed that the prostate tissue consists of two parts, the gland and the fibromuscular stroma. The anterior fibromuscular stroma is a fairly large area, accounting for about 1/3 of the total volume, and is not a gland at all, consisting mainly of smooth muscle fibers. The glandular portion is divided into a central zone and a peripheral zone; around the central zone is the peripheral zone. Many scholars believe that the central zone is more likely to have prostate hyperplasia and the peripheral zone is more likely to have prostate cancer. The prostate, like the parotid and pancreatic glands, is an exocrine gland in the human body. It is composed of several vesicles and ducts, and the prostate has 16 to 32 ducts that open in the posterior urethra. It can secrete a certain amount of exocrine fluid, namely prostatic fluid. It is also the largest accessory gland in the male reproductive organs and has a special role in male reproductive function.