In most people’s minds, men’s reproductive health is just a topic that is laughed about or downplayed, but often ignored afterwards. In life, men who are the top of the mountain show strength everywhere and are seen as a strong group psychologically, but unbeknownst to them, due to their own physiological characteristics and lack of knowledge about reproductive health, in modern life under the influence of a variety of factors that make men’s vulnerability is revealed. As a part of physical and mental health, male reproductive health is closely related to family happiness and social harmony, so we must not take male reproductive health lightly. The following, let us understand the male reproductive health knowledge, an inventory of men’s reproductive organs, in order to arouse people’s attention to it. 1. How many parts does the male reproductive system consist of? The male reproductive system is a functional structural system that produces male reproductive cells, secretes male hormones, completes the mating function, ensures the reproduction of offspring and the continuation of the race, and has age-related characteristics. The male reproductive system consists of two major parts: the internal and external genitalia, including the gonads (testes), the vas deferens (epididymis, vas deferens, ejaculatory ducts, urethra), and the three accessory glands (seminal vesicle, prostate, and urethral bulb gland). The external genitalia include the scrotum and the penis. 2.Where are the parts of the internal genitalia located? What is the shape? What are their functions? (1) Genital glands Testes: slightly flat and oval in shape, one on each side, indicating smooth and soft texture, living together with the epididymis in the scrotum. It is 4-5cm long, 3cm wide and 2.5cm thick, and its volume is about 15-25 ml. The testes are male reproductive glands whose main function is to produce sperm and secrete androgens. (2) Vas deferens ①Epididymis: close to the upper end and posterior edge of the testis, crescent-shaped, main functions: sperm maturation, storage and decay processing, absorption, secretion, processing. ②Vas deferens: starts at the tail of the epididymis (a continuation of the epididymal duct), rises from the posterior edge of the testis and the inner side of the epididymis, travels through the scrotum, subcutaneous spermatic cord, inguinal canal, and pelvic cavity, and converges at the end with the excretory duct of the seminal vesicle gland. The main function is to transport sperm. (3) Ejaculatory duct: The two sides of the vas deferens gradually approach each other in the pelvic cavity, and their ends merge with the excretory ducts of the seminal vesicle glands to form the ejaculatory duct. It passes through the prostate parenchyma and opens at the end in the prostate part of the urethra. The main function is to transport sperm and secrete seminal vesicle fluid. The urethra begins at the prostatic part of the urethra and ends at the external urethral orifice, where the paraurethral glands are distributed, with the main function of urination and semen transport. (3) Accessory glands ①Seminiferous glands: located between the bottom of the bladder and the rectum, the outer side of the end of the vas deferens. It is a long oval-shaped sac-like organ with an uneven surface and an excretory duct at the lower end. Its excretory duct converges with the end of the vas deferens to form the ejaculatory duct. The fluid it secretes is yellowish, weakly alkaline, slightly viscous, and is the main component of semen. ②Prostate gland: It is a single substantial organ. It is located between the bladder and the urogenital diaphragm shaped like a chestnut, with a wide upper end, a small lower tip, and a flatter back of the body. It wraps around the root of the urethra and is close to the rectum at the back and can be palpated by rectal palpation. The surface is covered with a fascial sheath called the prostatic (fibrous) capsule. The excretory ducts are small and numerous, all opening in the posterior wall of the prostatic part of the urethra. It can continuously secrete a thinner colorless milky substance that is acidic and is the main component of semen. (3) Urethral bulb glands: a pair of pea-sized spherical glands, located in the urogenital diaphragm, opening in the urethral bulb. The secretion plays the role of lubricating the urethra to facilitate ejaculation. 3.Where are the various parts of the external genitalia located? What is the shape? What are their functions? (1) Scrotum: It is a skin bag, located at the back of the penis. The scrotal septum divides the scrotum into two parts, the left and the right, accommodating the testicles and epididymis on each side. The wall of the scrotum is composed of skin and flesh membrane, which contains smooth muscle, which regulates the temperature of the scrotum and facilitates the growth and development of sperm (the normal growth and development of sperm is 1-2℃ below the body surface temperature). (2) penis: divided into four parts: head, neck, body and root, the tip of the head sagittal position with the urethral orifice. It consists of two penile corpus cavernosum and one urethral corpus cavernosum, and is covered with fascia and skin. The skin of the penis is thin, soft and stretchy. It is the male copulatory organ. 4. What is the spermatic cord and what does it contain? The spermatic cords are a pair of soft, round, cord-like structures that extend from the ventral ring of the inguinal canal, through the inguinal canal, to the upper end of the testes. The main contents of the spermatic cord are the vas deferens, testicular arteries and trapezius plexus, nerve plexus, lymphatic vessels, etc. In common parlance, it is like a network wire with multiple lines for different purposes.