Post Date November, 16 2024
The male reproductive organs are divided into two parts: the external reproductive organs and the internal reproductive organs. The external genitalia includes the pubis, scrotum, and penis, while the internal genitalia includes the testes, testes, spermatic cord, vas deferens and ejaculatory ducts, seminal vesicles, prostate, urethral bulb, urethra, etc.
① External reproductive organs
The pubic mound is the skin and abundant subcutaneous adipose tissue in front of the pubic bone. In young adulthood, the pubic mound is significantly raised, and in middle age, the adipose tissue decreases and subsides, while in the elderly, it atrophies and flattens.
The scrotum is a soft and elastic pouch composed of skin, muscles, and other components, including the testes, testes, and spermatic cord. Its main function is to protect the testes, regulate temperature, and facilitate sperm production and storage. There is a scrotum isolation inside the scrotum, and the internal cavity of the scrotum is divided into two parts, each containing the testicles and testes. The skin of the scrotum is thin and soft, with many wrinkles. The scrotal skin has obvious pigmentation and sparse pubic hair.
The posterior part of the penis is the root of the penis, and the central part is a cylindrical penis. The front end of the penis expands mostly to the glans penis (commonly known as the glans penis). There is a coronal sulcus between the axis of the penis and the head of the penis, which contains abundant nerve endings and is sensitive to stimulation. The distribution of coronal sulcus nerves is the most abundant and sensitive. The penis is composed of the corpus cavernosum of the penis and the corpus cavernosum of the urethra, which are rich in blood vessels, nerves, and lymphatic vessels. From the appearance, the penis has two states: relaxation and erection, and has three major functions: urination, sexual intercourse, and ejaculation.
② Internal reproductive organs
The testicles are male reproductive glands, ovoid in shape, with one on each side. They are suspended within the scrotum with a spermatic cord, measuring approximately 4-5 centimeters in length, 3-4 centimeters in thickness, and weighing approximately 15 grams. The testicle is an organ that produces male reproductive cells (sperm) and is also the main endocrine gland that produces male hormones.
The epididymis is located on the posterior lateral side of the testicles, with a slender, semi lunar shape, 1 centimeter on each side, and a length of approximately 5 centimeters. The testicles have the function of storing and expelling sperm, promoting sperm maturation, and providing sperm nutrition.
The spermatic cord is located between the upper end of the testicle and the abdominal ring of the inguinal canal, one on each side, with a total length of approximately 14 centimeters. The spermatic cord is a channel for the circulation of blood and lymph in the testes, testes, vas deferens, and the main pathway for ensuring testicular spermatogenesis and transporting mature sperm. The vas deferens is one of the main structures within the spermatic cord, and its end merges with the excretory duct of the seminal vesicle to form an ejaculatory duct. It passes through the prostate and opens into the urethra, with a total length of about 40-46 centimeters and a diameter of about 2-3 millimeters. The vas deferens is the only pathway for sperm to be transported from the testicles to the prostate urethra. The ejaculatory duct is the continuation of the union between the ampulla of the vas deferens and the seminal vesicle. The ejaculatory duct is short, about 2 centimeters long, and has a thin wall.
