Male reproductive system. The structure of the reproductive system of men
It is not a secret for anyone that for any man his sexual organs are of great importance, and in the body as a whole they perform very important and responsible functions. The main one is, of course, procreation. This function plays an enormous role in the life of any person. What is the anatomy and structure of the male genital organs in reality?
The main functions of the genitals
Male reproductive system performs a number of fairly important functions that are of great importance in the smooth operation of the whole body. They consist in the following crucial processes:
- development of male germ cells (so-called spermatozoa);
- throwing sperm into the vagina during intercourse;
- development of male sex hormones.
Male genital organs are divided into two main types: external and internal. The former include the scrotum and penis, and the latter include the testicles, their appendages, the urethra, the vas deferens, the prostate and other organs connected with it.
Features of the structure of the penis
Male genital organs are characterized by the presence of the main thing - it is a member. That it is the main source of secretion of a special fluid (sperm) in the female genitals.
The shape and size of the penis can vary depending on what degree of filling the cavernous bodies with blood, or on the level of erection, it is the same. Formed male reproductive system, namely a member, with the help of three parallel cylindrical bodies, one of them is spongy, and the other two are cavernous. All of them are covered with a dense shell.
Through the first body, which is located on the lower side of the penis, the urethra (urethra) is surrounded. It is for him to go sperm and urine.
Cavernous bodies (right and left cylinders) during sexual arousal overflow with blood, and this is what leads to erection of the penis. They are located in close proximity to the spongy body. In the middle of these cylinders are the legs of the penis, firmly fixed to the bones of the pelvis.
The genitals are arranged in such a way that the end part of the member is the head, which is covered with skin, called "foreskin".And the openings of the urethra, which are slit-like, are located at the very top of the head.
What is sperm?
Sperm is a special characteristic mixture consisting of sperm and the characteristic secrets of the male glands secreted by the appendages of the testes, prostate gland and seminal vesicles, all of which have their own specific functions in the process of ensuring the movement of sperm to the already mature egg.
When ejaculation occurs, an average of about five milliliters of sperm is released, containing about three hundred million sperm.
An erection is considered to be a condition during which the maximum stress of the member is observed, which helps to subsequently have sexual intercourse. In this process, the spongy body is quite densely filled with blood, and there are characteristic sensations of direct strand.
Male genital organs and their circulatory system
The member is constantly actively supplied with blood due to the numerous vessels and nerve fibers that penetrate it abundantly and increase the sensitivity during sexual intercourse.The greatest number of nerve endings is located in the head of the penis, namely, on its crown, where the border of the head and the body of the penis itself passes.
At the bottom of the head there is the most sensitive area, which is called the bridle of the penis. Here, when inflammation occurs, rather sharp and painful sensations appear, usually aggravated by sexual intercourse. In addition, in some situations, the foreskin can stick to the head. This condition appears due to the increased accumulation of a special substance. It is usually cheesy-looking and oily to the touch. It is called smegma. It consists of the remnants of sweat, dirt and dead skin cells (epidermis).
Testicles and their features
The male reproductive system is characterized by the presence of testicles. They are paired oval bodies, in size and shape similar to slightly flattened walnuts. The testicles are located in the scrotum (sacciform skin-muscle formation). The approximate weight of one testicle is twenty grams, and sizes in adult males range from three to four centimeters.
These organs are quite sensitive to the use of any physical effect. This is primarily due to the fact that the testicles are covered on top of very densely located nerve endings and blood vessels. In addition, they are the organs that are responsible for the production of male germ cells (sperm).
The location and significance of the testicles
The organs of the male reproductive system mainly function so that the sperm production process takes place. It proceeds in the main structure of the testicles, namely in the seminiferous tubules, and is called spermatogenesis. As a rule, one testicle is lower in all cases than the other. There is also a version that in men who are right-handed, the bottom is the left testicle, and those who consider themselves left-handed - right.
In addition, the testicles are also endocrine glands, which are involved in the production of sex hormones in men - androgens, testosterone is considered the main one. Outside they are smooth, and in the middle they are divided into two hundred or three hundred cloves, in which the seed canals are located. These tubules are small tubes that form a spiral.It is here that for a period of seventy-two days, millions of sperm appear.
Thus, the testicles perform two very important functions. This is the formation of sperm and the production of male sex hormones.
Functions and meaning of the scrotum
The male reproductive system also consists of the scrotum. This organ is a leather pouch, located at the very base of the penis. It is covered with delicate skin and has very sparse hairs. The scrotum is divided into a couple of parts according to the number of testicles with a special septum. Depending on what temperature is present, the scrotum may increase and decrease in size. This property completely ensures the retention in the testicles of a constant temperature level, and this, in turn, is a very important condition in the process of spermatogenesis.
Inside the scrotum is a very important complex of organs that provides male sexual functions, as well as the ability to continue the race. These include the testes, their appendages and the spermatic ducts. In the walls of the scrotum there is a thin layer of smooth tissue, which is reduced during intercourse, during exercise and various sports, as well as under the influence of cold.This is a protective reaction, which is aimed at the preservation of the testicles and keeping them at a constant temperature, and, moreover, it serves as a guarantee of optimal maturation of spermatozoa.
Features of the vas deferens
The system of male genital organs includes the ejaculatory ducts. They are presented in the form of paired channels connecting the urethra with the epididymis. The size of each such duct is about fifty centimeters, and the diameter inside is half a millimeter.
The vas deferens passes a rather complicated path, during which they move from the testicles to the abdominal cavity, then overcome the prostate gland, and then exit directly to the urethra.
The structure of the male reproductive system also includes an important glandular and muscular organ. This is the prostate gland. It is a unpaired organ that is directly adjacent to the bladder below and encircles the urethra.
In size, it is no larger than a normal chestnut. Through the prostate (prostate gland) passes the urethra.It is the prostate that produces a special secret in the seminal fluid that ensures the vital functions of sperm. In other words, sperm is the secret of the prostate and seminal vesicles and contains sperm.
The so-called seminal vesicles are not at all the place of storage of the seed. As well as the prostate, they are actively involved in the process of seminal fluid production. The secret of the seminal vesicles is that the sperm is diluted and sperm are advanced.
On the left and right sides of the prostate gland, symmetrically in relation to each other, are the so-called Cooper glands. They have the characteristic shape of peas. In addition, they are connected using a special duct directly to the urethra. During the period of sexual arousal, these glands secrete the corresponding secret, which allows to moisturize the mucous membrane of the urethra just before the ejaculation process.
Urethra and its features
The anatomy of the male reproductive system is also based on such an important organ as the urethra.It belongs to the urinary and genital systems at the same time, as it serves as the main helper for urine to be naturally excreted and sperm discharged. The beginning of the urethra takes the bladder, and its end is represented in the form of a slit on the head of the penis.
The prostate gland itself enters the urethra at the ends of the vas deferens, along which the sperm moves. The development of the male reproductive system shows that at the time of release, the sperm is erupted through the urethra directly into the female's genital tract.
The value of the seminal vesicles
Seminal vesicles are special paired gonads of men, which have the appearance of oblong bags with a cellular structure. They are located above the prostate gland, namely, between the rectum and the lower side of the bladder. In terms of their value, they serve as a specific storage of male genetic material (spermatozoa).
The functions of the male reproductive system are characterized by the fact that in the seminal vesicles in the process of ejaculation from three to six milliliters of sperm are secreted, of which about seventy percent is the secret of the prostate gland.
In its immediate function, male seminal fluid is needed not only to neutralize the acidic environment of the urethra and female vagina, but also to supply sugar. It is the source of energy for the process of sperm movement. In addition, prostaglandin hormones are also supplied here, which increase the level of contraction of the uterus and its tubes, while accelerating the movement of millions of sperm cells directly to the egg cell.