The male reproductive organs are divided into two parts: internal genitals and external genitals.
(1) Male internal reproductive organs: Male internal reproductive organs include testicles, epididymis, vas deferens, ejaculatory ducts, seminal vesicles, prostate and bulbourethral glands.
①Testicle:The testicle is the male gonad, located in the scrotum, on the left and right sides. 1. Generally, the left side is about 1 cm lower than the right side, and the shape is an ellipsoid with flat sides and a smooth surface. Generally, the right testicle is slightly larger than the left. Testicles are male gonads, the organs that produce sperm and secrete male hormones.
② Epididymis: It is attached to the back, upper and outer sides of the testicles, one on each side, and is long. The cylinders of varying thicknesses are 4 to 6 centimeters long and about 0.5 centimeters in diameter, and are composed of many curled and thin tubes. Sperm produced by the testicles are transported to the epididymis for storage through these small tubes. Sperm from all mammals, including humans, must be cultured through the epididymis to mature and have the ability to fertilize. The epididymis is where sperm matures and is stored.
③ Seminal vesicle glands: One on each side, an oval muscular sac, 2~ long 5 cm, it combines with the end of the vas deferens to form the ejaculatory duct, which opens into the urethra in the prostate part of the urethra. The seminal vesicle gland has a secretory function, and its function is regulated by testosterone. The secretion is a viscous protein that is alkaline, light yellow, and liquid. It can dilute semen and neutralize acidic substances in the vagina and cervical canal. Function to maintain the vitality of sperm in the vagina and uterus. Most of the fructose in semen is also secreted by the seminal vesicles, which has the function of nourishing sperm and enhancing sperm activity. The lack of fructose in semen can seriously affect sperm motility.
④Prostate: It is an unpaired solid organ and the largest gland among the male reproductive organs. , with the urethra passing through it.
The prostate can secrete prostateProstatic fluid is a milky white fluid that is also part of semen. The development of the prostate is closely related to sex hormones. The prostate is underdeveloped in childhood and grows rapidly with sexual maturity, reaching its peak on average around the age of 24. It is generally believed that after the age of 50, the glandular tissue of the prostate begins to degenerate, atrophy, and secretion decreases. If connective tissue proliferates, prostatic hypertrophy occurs.
⑤Bullourethral glands:It is a pea-sized gland, one on each side, with a diameter of 0. 5 to 0.8 cm, located behind and above the urethral bulb.
The bulbourethral gland secretes an alkaline mucin, which functions to lubricate the urethra, neutralize the remaining acidic urine in the urethra, and facilitate sperm production.
The seminal vesicles, prostate and bulbourethral glands are all accessory glands of the male reproductive organs. They mainly secrete liquid to form semen, which protect, nourish and enhance the vitality of sperm, and make the semen have a Solidification and liquefaction processes.
(2) Male external reproductive organs: The male external reproductive organs consist of the penis, urethra and scrotum.
①Penis:The penis is the male’s sexual organ, responsible for transporting sperm into the female There are abundant blood vessels and nerves in the reproductive tract and penis, which can appear as congestion, enlargement, and erection during sexual erection, and then return to weakness after orgasm. The glans penis, also known as the glans penis, is the male\’s sexually sensitive area.
②Urethra: The urethra is located in the penis and is the channel for urination and semen during sex. Ejection channel.
③Scrotum: The scrotum is a skin sac that wraps the testicles, epididymis and the lower half of the vas deferens. . The scrotum is usually in a contracted state, with wrinkles appearing on the surface. It is particularly sensitive to temperature changes, and can contract and relax accordingly and secrete sweat glands and sebum to maintain a low temperature environment in the testicles (around 35°C), which is conducive to the production and maturation of sperm.
This article is provided by Baidu Reading and is excerpted from \”Three Months Before Pregnancy – Pregnancy Preparation Period\” Author: Wang Liru