Where is the seminal vesicle?

I believe that every man is familiar with the seminal vesicle. All normal men have seminal vesicles. However, if many men are asked where the seminal vesicles are located, they really can't tell it. So, where is the seminal vesicle? The following is a simple understanding and understanding of this issue. I hope the following points will be of some help to everyone!

The location of the seminal vesicle is on the upper back of the male prostate, on the outer side of the ejaculatory duct, between the bladder base and the duodenum. The surface of the seminal vesicle is uneven, showing convex and concave lesions. It is composed of coiled tubules. The secretion of the seminal vesicle constitutes a large part of male sperm. The seminal vesicle is elliptical in shape, with one on each side. The seminal vesicle cannot exist independently.

If the seminal vesicle is missing, the patient will suffer from infertility, or if the patient has seminal vesicle cysts, infertility will occur. When seminal vesiculitis occurs, the pH value will decrease, and male sperm cannot be vaporized, which will cause other symptoms. Therefore, in daily life, once the seminal vesicle has some inflammation, active treatment should be carried out.

Location of the seminal vesicle

The seminal vesicle, also called the spermatocyst, is an oblong sac-like organ located above and behind the prostate gland and at the bottom of the bladder, on both sides of the ejaculatory duct calcaneus, one on each side, with an uneven surface, about 4-6 cm long, 1.5-2.0 cm thick, and 2-4 ml in volume, and is a fusiform cyst that is flat from front to back and from left to right. The thin and straight lower part of the seminal vesicle is the metabolic duct, which converges with the tail end of the ejaculatory duct calcaneus to form the vas deferens. The vas deferens is about 2 cm long, penetrates the prostate gland from the bottom of the prostate gland, opens on the spermatic condyle, and is also a safe channel for transporting sperm. Under the stimulation of male hormones, the seminal vesicle metabolizes a weakly alkaline light yellow liquid containing glucose, prostaglandins and other ingredients. Glucose provides energy for the movement of sperm. Because the seminal vesicle and ejaculatory duct have the same IVF embryonic origin, congenital ejaculatory duct defects are accompanied by seminal vesicle defects. This can be used to distinguish azoospermia due to testicular abnormalities (complete azoospermia) from azoospermia caused by congenital defects of both ejaculatory ducts. In the former case, there is no glucose in the semen, and only a small amount of sodium citrate in the seminal vesicle secretion.

Function of the seminal vesicle

In the past, it was mistakenly believed that the seminal vesicle was an organ that stored sperm. Now it is known that the seminal vesicle is a duct gland that is one of the sex hormones for men. The seminal vesicle is metabolized only when men ejaculate, and its secretion is the main source of semen. It is mixed with the secretion of the prostate gland and the bulbourethral gland, as well as the sperm stored in the tail of the epididymis and the ejaculatory duct to form semen. The seminal vesicle secretion is alkaline, a light yellow liquid, containing glucose, prostaglandins, and clotting enzymes. Sperm analysis shows that part of the semen that is finally ejaculated is the seminal vesicle secretion and a small amount of sperm. Compared with other parts of the semen, this kind of sperm is not active or has little activity, and is often of low quality. The sperm in the seminal vesicle is because the semen is injected into the seminal vesicle during sexual inactivity. The longer the sexual inactivity period, the more sperm are stored in the seminal vesicle. Since the seminal vesicle fluid is the final fluid to be ejaculated, it actually plays a role in breaking the sperm in the urethral opening. The glucose content in the seminal vesicle secretion is very high, which is the source of energy for the movement of sperm after being discharged from the body. The prostacyclin in the semen was previously believed to come from the secretion of the prostate gland, so it was incorrectly named "prostacyclin", but now it has been confirmed that it comes from the seminal vesicle. There are many types of prostacyclin in the seminal vesicle secretion, some of which relax the cervix, and some of which can enhance the movement of sperm and the ability to pass through the cervical mucus to increase the fertilization rate. The coagulase in the secretion can temporarily coagulate the semen after ejaculation to limit the activity of sperm, save energy and facilitate fertilization.