Where is the prostate?

The prostate is located between the bladder neck and urogenital diaphragm, that is, the bladder neck deep in the root of male penis, which surrounds the posterior urethra and is shaped like a chestnut, with the bottom up and the tip down. It is divided into three parts: bottom, body and tips. The upper part of the prostate floor is located in the neck of the bladder, and the front part of the prostate floor is penetrated by the urethra.

Between the apex and the basal part, there is a prostate, and the urethra passes through the prostate solid and goes out at the front upper part of the apex. The lower limit of the true pubic symphysis in the prostate pelvis is behind the pubic arch in front of the ampulla of rectum. There is a shallow longitudinal groove in the middle of the back of the prostate, which is called prostatic groove.

The size, hardness and surface morphology of the prostate can be detected by anal digital examination of the anterior wall of rectum, and the prostate is adjacent to the rectum. There is a small impression on the upper back of the prostate, in which the left and right ejaculatory ducts penetrate, and its fascia is fused with the fascia above the adjacent levator ani.

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Extended data:

Prostate is an important organ of male gonad, which generally has the following functions.

First of all, it has exocrine function.

Prostate is the largest accessory gonad of men and one of the exocrine glands of human body. It can secrete prostatic fluid, is an important component of semen, plays an important role in the normal function of sperm and is very important for fertility. The secretion of prostatic fluid is regulated by androgen.

Second, it has endocrine function.

Prostate is rich in 5α- reductase, which can convert testosterone into dihydrotestosterone with more physiological activity. Dihydro testosterone plays an important role in the pathogenesis of benign prostatic hyperplasia. By blocking 5α- reductase, the production of dihydrotestosterone can be reduced, thus shrinking the hyperplastic prostate tissue.

Third, it has the function of controlling urination.

The prostate surrounds the urethra and is close to the bladder neck, forming a proximal urethral wall, and its annular smooth muscle fibers surround the urethra prostate and participate in the formation of internal urethral sphincter. When micturition impulse occurs, with the contraction of detrusor, the internal sphincter relaxes, which makes micturition go smoothly.

Fourth, it has the function of transportation.

There are urethra and two ejaculatory ducts in the prostate parenchyma. During ejaculation, the muscles of prostate and seminal vesicle gland contract, and the contents of vas deferens and seminal vesicle gland can be pressed into the posterior urethra through the ejaculatory duct and then excreted. To sum up, the prostate has four important functions and plays an important role in the human body.

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