The male physiology consists of two main parts, the external and internal reproductive systems. The external reproductive system consists of the penis, scrotum, and mons pubis. The internal reproductive system consists of the testes, accessory glands (seminal vesicles, prostate, urethral glands, paraurethral glands), and ducts (epididymis, vas deferens, ejaculatory ducts, urethra). The penis is both an important male reproductive organ and one of the organs of the male urinary system. Its “inside” consists of a urethral corpus cavernosum and two penile corpus cavernosum, while the “outside” is surrounded by the foreskin. The erection of the penis is controlled by the parasympathetic nerve, which dilates the arterial vessels of the penis and closes the lumen of the veins, when the venous return is blocked, the corpus cavernosum and urethral corpus cavernosum become engorged with blood and become erect. NO.2 Scrotum, fragile “little baby” The scrotum is shaped like a pocket, divided into the left and right sides, each side contains the testicles, epididymis and spermatic cord lower section, protecting them. Adult men often have symptoms of scrotal dampness due to local impermeability and easy sweating, which manifests as redness and itching and seriously affects normal life. Therefore, in everyday life must not neglect the protection of the scrotum, once it is “injured”, the consequences are really unimaginable! NO.3 scrotum, one of the signs of male secondary sexual characteristics scrotum refers to the skin and subcutaneous tissue in front of the pubic bone, the surface of the long pubic hair, is the sign of male secondary sexual characteristics. NO.1 Testes, the sperm “hatching egg” The testes have no greater function than to produce sperm and secrete androgens, namely testosterone, which can hatch an army of thousands of sperm and produce androgens that make men more manly and maintain the development of male beards, throat knots and skeletal muscles. The testicles are hidden in the scrotum, one on each side, and are oval in shape, hence the name “balls”. (Ps: most men’s testicles are actually low on the left and high on the right) NO.2 The Invisible Adnexal Gland As the “big brother” of the adnexal gland department, it naturally belongs to the prostate. It is shaped like a chestnut and is located in front of the anus and above the bladder. The accessory glands secrete prostate fluid to stimulate sperm vitality and thus facilitate the formation of fertilized eggs. The spermatophore, as the name suggests, has nothing to do with sperm. That’s right! The main function of the seminal vesicles is to secrete the fluid that makes up seminal fluid, which nourishes and dilutes sperm. The urethral glands and paraurethral glands are a pair of pea-sized glands, when the man’s brain sends “sexual impulse signals”, these two glands will secrete a bright and viscous liquid, which plays a role in lubrication during sex. NO.3 Complex duct system The epididymis in the duct system is the “home” of the testicles, which is close to the upper end and rear edge of the testicles and can be divided into three parts: head, body and tail, which can store sperm and secrete epididymal fluid, which contains enzymes and nutrients that help the maturation of sperm. The main function of the vas deferens and ejaculatory ducts is to transport sperm, and the latter also has the function of ejecting semen. The urethra is the urinary tube that leads from the bladder to the surface of the body. The male urethra is thin and long, and has both urinary and seminal functions, with a total of three strictures throughout: the inner urethra, the membrane, and the outer urethra, which are often the site of stone retention. The structure of the male reproductive system is so wonderful, each organ has its own role to play, only to understand, in order to properly care for and care for them all the time “silent work”.