What is the fluid secreted when the penis is hard?

In life, many men are prone to secretions when their penis has physiological reactions. This liquid is normal. It is a transparent liquid secreted by the prostate. It is transparent or milky white and shiny. It is secreted by the stimulation of female hormones and is normal. It also contains some semen.

What is the fluid that is secreted when the penis is erect?

Prostatic fluid is the secretion of the prostate. Under normal circumstances, it is relatively thin, colorless or light milky white liquid, with a protein luster, weakly acidic, and a pH value of about 6 to 7. The secretion of prostatic fluid is controlled by male hormones, and the daily secretion volume is about 0.5 to 2 ml. It is an important component of semen, accounting for about 1/10 to 1/3 of the amount of ejaculated semen.

The protein content in prostatic fluid is very low, and it mainly contains high concentrations of zinc ions, acid phosphatase, protease, fibrosis, spermine, aliphatic peptides, etc. Among them, protease and fibrosis have the effect of promoting semen liquefaction. The detection of acid phosphatase and citric acid can help judge the function of the prostate and whether there is cancer.

Under a microscope, the following components can be seen in prostatic fluid:

(1) Lecithin bodies: They are evenly distributed in the prostatic fluid. They are spherical bodies of varying sizes, have strong refractive index, and are numerous.

(2) Blood cells: including white blood cells and red blood cells. Under normal circumstances, the number of white blood cells per high-power field of view does not exceed 10, and they are scattered, not in piles or strings. Red blood cells are occasionally seen. In addition, epithelial cells, sperm, and starch granules can occasionally be seen in prostatic fluid. Prostatic fluid and semen are different, but the two are closely related.

Prostatic fluid is a component of semen, mainly secreted by the prostate, and semen contains secretions from multiple glands. Semen is a mixture of sperm and seminal plasma. Sperm is a living cell produced in the seminiferous tubules of the testicles, and there are many of them. Seminal plasma is composed of testicular fluid, epitesticular fluid, vas deferens peritoneal fluid, accessory gland secretion fluid and urethral gland fluid, including prostatic fluid. Prostatic fluid accounts for about 20% to 30% of seminal plasma, but the largest amount is the seminal vesicle secretion fluid, which accounts for about 60% to 70% of seminal plasma, and the remaining components account for only 10%.

Seminal plasma is the necessary medium for transporting sperm. It also contains substances necessary for maintaining sperm life and can stimulate sperm motility. Semen contains a variety of substances, such as high concentrations of organic matter, inorganic ions and various enzymes. Among them, many enzymes related to semen coagulation or liquefaction come from prostatic fluid, such as aminopeptidase, fibronectin, arginine ester hydrolase, etc.

In addition, all citric acid is secreted by the prostate, and its function is to maintain the osmotic pressure of semen and the activity of sperm hyaluronidase.