Chinese name: male genitalia mbth: male genitalia alias: male reproductive system composition: internal and external genital components, testis, epididymis, vas deferens, seminal vesicle, spermatic cord, * * * tube, * * *, health care points, * * *, scrotum, * * *, six taboos, erection process, and the main function of testis is to produce. * * * is fertilized by combining with eggs, which is an important material basis for breeding offspring; Testosterone is an important substance to maintain male secondary sexual characteristics (accessory sexual characteristics). The main function of epididymis is to promote the development, storage and transportation of * * *. * * * is produced by testicular seminiferous tubules, but it lacks fluidity and fertility and needs to continue to develop and mature. This stage is mainly carried out in the epididymis. The epididymis secretes a liquid, which directly breeds the maturity of * * *. This liquid is called epididymal fluid, which is referred to as * * *. It has high liquid potassium, high glycerol phosphate bile salt concentration, high glycosidase concentration, low pH value, high osmotic pressure, low oxygen and high carbon dioxide. Physiological anatomy of vas deferens has a strong peristalsis ability, because the wall muscle of vas deferens is very thick, and its main function is transportation and excretion. When * * *, the sympathetic nerve endings release a large amount of norepinephrine-like substances, which makes the vas deferens contract harmoniously and forcefully, and quickly transports * * * to the spermatic duct, * * * duct and urethra. The main function of seminal vesicle is to secrete mucus, which does not produce or store * * *, and contains seminal vesicle glands. Seminal seminal vesicle secretion is an alkaline colloidal liquid containing mucus, bile phosphate, globulin, citric acid and glycoside. Citric acid (125mg/ 100ml) and glycosaminoglycosides (3 15mg/ 100ml) are the main components of * * *, accounting for about 50% ~ 80%. The main function of male genital spermatic cord is to suspend testis and epididymis in scrotum to protect them from damage, and at the same time contract or relax with the change of temperature, so that testis can adapt to the external environment, keep the best conditions for producing * * *, and make testis produce involuntary activities (levator testis). * * * The main function of the tube is * * *. * * * The wall of the tube is rich in muscles and has strong contractility, which is helpful for * * * to eject blood. At the same time, the opening of * * * tube is located in the steep position of urethra, which is small and narrow. In order to ensure the proper pressure when * * *, on the other hand, * * * seems to have a feeling of "squeezing out" through a narrow opening, which triggers * * * * through nerve reflex, thus reaching the sexual period. * * * The main function is urination, * * * and * * *, which are the main organs of sexual behavior. * * * The skin is extremely thin, there is no fat under the skin, and it moves freely and stretches freely. * * * The cavernous sinus can be attached with blood. When asexual, * * * is soft. During sex, * * * blood in cavernous sinus increases, * * * is huge, thickens and hardens, resulting in erection. When the inflow of blood and the return of blood are equal, then * * * continues to erect; * * * The head is rich in nerve endings and extremely sexy. When * * * reaches * * *, * * is caused by the high excitement of * * * center. If * * * can't get an erection or the erection hardness is not enough, you can't do * * * activities, which is called "impotence". * * * Abnormal erection or * * * deformity may lead to * * * difficulties. Key points of health care Male external genitalia includes scrotum and scrotum. External genital hygiene is a "blind spot" for men, and many people don't know why male external genitalia also needs cleaning. This can be analyzed from the following three aspects: * * * is divided into * * * heads, also called * * * and * * *. The junction of * * * head and * * * is called the coronal sulcus, and there is an upturned foreskin in the coronal sulcus. Epithelial cells, gland secretions, dust and residues after urine evaporation in the foreskin accumulate to form scales, which reach the head and easily cause inflammation. If the foreskin still covers all the heads during puberty, it is called "phimosis", and if it can turn up, it is called "foreskin is too long". People with phimosis whose foreskin is too long, because the foreskin tightly wraps the head of * * *, produce more scales and do more harm. Studies have shown that skin scales can cause cancer, which leads to cancer. At the same time, unclean external genitalia can induce reproductive diseases of married spouses. Scrotum Scrotum is an important tissue to protect testis. There are abundant sweat glands on the skin surface of scrotum, which often secrete sweat. If it is not cleaned for a long time, the scrotum will be infected and inflamed under the action of sweat and bacteria on the skin surface. Long-term sweating is also an important cause of scrotal eczema. * * * * * There is always a small amount of feces left in the mouth of * * * every day, and there are many bacteria in the feces. A warm and humid place will be a good breeding ground for bacteria. For the above reasons, men should also wash their clubs regularly. Pay attention to the front scrotum and scrotum when cleaning, especially to remove the dirt in the foreskin, and then clean the back scrotum to keep these parts clean. Teenagers with long foreskin and phimosis should ask a doctor to check them and see if they need surgery. Six bogey 1. Avoid frequent and intensive sexual life. Moderate sexual life can bring people happy mood and experience, which is good for health and health. However, if you indulge yourself, you will suffer from chronic congestion of reproductive organs, which will lead to sexual dysfunction and easily lead to diseases such as prostatitis, prostatic hypertrophy and premature ejaculation. 2. Avoid premature sexual life Generally speaking, men will not mature until they are 24 or 5 years old. Premature sexual life is easy to cause sexual dysfunction in different degrees, and premature ejaculation, male fistula, backache, aging and other diseases are easy to occur in adulthood. 3, avoid frequent self-examination Medical research has proved that testicular cancer and * * * cancer have a high cure rate in the early stage, and once they develop to the late stage, the curative effect is not ideal. Therefore, men over the age of 35 may wish to check their external reproductive organs frequently to prevent possible diseases from being ignored. 4, avoid not talking about hygiene, pay attention to sexual organ hygiene is not just a woman's business, men should also pay equal attention. Especially if the foreskin is too long, it is necessary to remove the scale frequently, because the scale is not only easy to cause cancer, but also easy to cause your partner to suffer from cervical cancer. 5. Avoid wearing jeans or tights every day. Medical research has proved that male reproductive system requires the best at low temperature. Often wearing jeans or tights will make the local temperature too high, forming a bad * * *. 6. Avoid unclean men. Many sexually transmitted diseases, such as syphilis and gonorrhea, are related to unclean men. Unclean * * * will not only make you sick, but also make your partner and even your children infected with pests and diseases, which is extremely harmful. Don't take any chances. Be sure to live a completely clean life. When the cerebral cortex is receptive during erection, the output impulse will be transmitted to the spinal cord. Impulses from the anterior hypothalamus project to the sacral center of spinal nerve, while impulses from the posterior thalamus project to the thoracolumbar center of spinal cord through the midbrain tegmentum. Parasympathetic nerve fibers leave the anterior root of spinal cord from S2 to S4 of sacral spinal cord, and dominate male genitalia through abdominal plexus from chest 12 to waist 3 through pelvic nerve and sympathetic nerve fibers. The dorsal nerve of male genitalia enters the posterior margin of genitourinary septum, innervates the bulbocavernous muscle and ischiocavernous muscle, then enters the posterior branch of fascia under genitourinary septum, innervates male genital cavernous body, urethral cavernous body and urethra, and then branches forward between suspensory ligaments of male genitalia to innervate skin, foreskin and * * *. There are abundant sensory receptors in male genitalia, which transmit impulses to sacral pulp through * * * nerve and connect with parasympathetic efferent nerve, thus causing male genital erection.