Eggs or, in other words, testicles refer tointernal male sexual organs. The structure of the testes has a dual function: the formation of spermatozoa and the increment of hormones. These hormones give the man a characteristic masculine appearance, low voice, the presence of vegetation on his face. They also define specific male behavior and mentality.
The normal size of the testicles is 3-4.5 cm at a weight of 20-30grams. They are in a pouch of skin called a scrotum. Skin of the scrotum is pigmented, outside the septum between the testicles there is an embryonic suture, which can differ greatly in color from the skin of the scrotum. It has a huge amount of sebaceous and sweat glands, the release of which has a specific smell.
Already in the first months of fetal developmentto form testicles. They are located next to the kidneys, and then they descend into the scrotum. The question arises, what is the point in this transformation? It turns out that it is very large. The fact is that for the development of spermatozoa requires a lower temperature - somewhere around 34 ° C. Naturally, such a temperature inside the body can not be achieved, and in the scrotum is supported just the right conditions for the formation of spermatozoa. Thus, men who lead a sedentary lifestyle should get up from time to time, so that the testicles are away from the hot body and cooled.
The eggs are surrounded by a membrane and separated from each otherfriend partition. They are suspended on the seminal cord, which in turn consists of the vas deferens, muscles, nerves, blood and lymph vessels. The muscle, called cremaster, when contracted, pulls the testicle to the body, in a relaxed position, moves it away from the body. It automatically maintains the temperature inside the scrotum. In warm conditions they fall lower, and in cold conditions, they are pulled to the body. Also, the scrotum is the erogenous zone of a man.
The testicle has several auxiliary structures.For example, in the appendage within two weeks the spermatozoa mature, where they acquire the necessary mobility. The structure of the testicles is as follows: under the testicle of the testicle is the parenchyma. It consists of numerous lobules (from 250 to 300), which are filled with seminiferous tubules. In each lobule there are two or three of them, their length is 70-90 mm, they are in folded form. They consist of spermatogenic epithelium, in which sperm are born.
The structure of the testicles is such that a part of the lobulesis a connective tissue that produces male hormones - testosterone. It turns out that the testes perform two functions - they are the gland of internal secretion, directing the hormones directly into the blood, and at the same time - the excretory gland, which takes the spermatozoa out. The structure of the testicles is such that only spermatozoa form in them. The liquid part of the sperm is formed from the secrets of the prostate and seminal vesicles. The prostate gland is located next to the peritoneum, in case of her illness the doctor gropes her through the rectum. It produces a fluid called prostatic juice. In appearance - it is a white with a characteristic odor liquid, consisting almost entirely of protein.
Seminal vesicles are above the prostategland. This paired organ, its approximate dimensions - 5x2x1 cm. Bubbles produce a yellowish liquid with increased viscosity, which facilitates the movement of spermatozoa.
As already mentioned, in the epididymismaturation of spermatozoa, here they are stored. The structure of the male testicles also contains the seminiferous tubules, which, merging, form about 15 endoral tubules, flowing into the epididymis.
Since the spermatozoa that form in the testicles can not move independently, their movement is due to increased pressure in the testicles themselves due to the formation of new spermatozoa.
The vas deferens are a continuation of the epididymis. The movement of the sperm along the vas deferens is performed by wave-like contraction of the corresponding muscles.
