Male urogenital system diagram

Male reproductive system diagram, the male reproductive system consists of two parts: internal reproductive organs and reproductive organs. The internal reproductive organs are composed of the location of the prostate (male testicles), the ejaculatory duct (episodic cyst, ejaculatory duct, vas deferens and urethral opening) and the accessory glands (spermatic vesicle, male prostate, bulbourethral glands). The reproductive organs include the scrotum and male reproductive organs. So, what are the male reproductive system diagrams? Let's have a simple understanding of this issue. I hope the following points will be helpful to everyone!

1. Internal genitalia:

(I) Location of the prostate: The male testicle is located in the scrotum, one on the upper and one on the lower. It is a flat oval body, divided into upper and lower parts, inner and outer parts, and front edges. The surface is covered with a high-density connective tissue called the tunica albuginea. At the edge of the male testicle, the tunica albuginea thickens and penetrates into the male testicle essence to form radial septa, which separate the male testicle essence into many cone-shaped male testicle lobules, each of which contains 2-3 convoluted seminiferous tubules. The connective tissue in the middle of the convoluted seminiferous tubules contains interstitial cells that can metabolize male hormones. The seminiferous tubules converge into straight seminiferous tubules at the apex of the male testicular lobule and then interweave with each other to form a network. Finally, more than ten efferent ductules are transmitted from the edge of the male testicle to the epididymal cyst.

(ii) Ejaculation duct:

1. Epididymal cyst: Epididymal cyst is close to the top and edge of the male testicle, and can be divided into three parts: head, body, and tail. The head is composed of the efferent tubules, and the tail end of the efferent tubules is connected to an epididymal duct. The epididymal duct is about 4-5 meters long and consists of the body and tail. Function: Provide nutrients for the growth and development of male sperm: The epididymal duct wall secretes substances - some growth hormones, enzymes, and special substances - to provide nutrients for the growth and development of male sperm; store male sperm: male sperm is stored, grows, develops, and actively moves upward here. 2. Ejaculatory duct: The ejaculatory duct is about 40 cm long and is in the shape of a tight round cord. The ejaculatory duct has a long course, from the scrotum to the outer subcutaneous tissue, and then enters the abdomen and pelvis through the inguinal canal. It expands to form the ejaculatory duct vent on the inner side of the seminal vesicle behind the bladder, and its tail end narrows to form the vas deferens with the metabolic duct of the seminal vesicle. 3. Vas deferens: The vas deferens is about 2 cm long, passes through the prostate gland, and opens at the prostate part of the urethra.

(iii) Accessory glands:

1. Seminal vesicle: A flat oval sac-like organ, located behind the bladder, on both sides of the ejaculatory duct, its metabolic duct and the tail end of the ejaculatory duct form the vas deferens. 2. Prostate: Chestnut-shaped, located between the bladder and the urogenital diaphragm, divided into base, body, and tip. There is a longitudinal shallow groove behind the body, which is the prostatic groove, and there is a urethral opening inside. Function: Metabolizes a milky alkaline liquid containing a lot of oxalate and acid phosphatase, called semen. Its function is to neutralize the acidic and alkaline liquid encountered by sperm in male ejaculation, thereby ensuring the activity and fertilization ability of sperm. Semen is the key component of seminal plasma, accounting for about 20% of seminal plasma. The male prostate gland can also metabolize growth hormone, called prostacyclin, which has the functions of transporting male sperm and egg cells and affecting the fitness of the uterus. 3. Bulbourethral gland: It is buried in the urogenital diaphragm, lentil-shaped, and opens at the beginning and end of the urethral spongy body. Function: Metabolize egg white-like alkaline fluid, which is discharged into the bulbourethral part and participates in the composition of semen.

2. Reproductive organs:

1. Scrotum: It is a sac composed of skin. The subcutaneous tissue contains a lot of smooth muscle chemical fibers, called the fascia carnosus. The fascia carnosus forms a scrotal septum on the median reticularis to separate the male testicles and epididymal cysts on both sides. Its skin is composed of smooth muscle and connective tissue, which contracts the left ventricle to adjust the temperature in the sac. The temperature inside the scrotum is lower than the human body temperature, which is of great practical significance to the growth, development and survival of male sperm. Sperm cells are more sensitive to temperature, so when the body temperature rises, the scrotum left ventricle expands, which helps to reduce the temperature of the scrotal bones; when the body temperature drops, the scrotum contracts to store the temperature inside the scrotum.

2. Male genitals: It can be divided into three parts: glans penis, genital body and genital root. There is a ring-shaped coronal groove between the glans penis and the body. The glans penis is a large part developed at the front end of the male genitals, with the urethral opening at the top. The slightly smaller part behind the head is called the genital neck. The male genitals are composed of two corpora cavernosa and one urethral corpora cavernosa, and the outer bread is composed of muscle fascia and skin. The urethral corpora cavernosa has a urethral opening surrounding its total length. The front end is the glans penis, and the rear end is the urethral opening bulb. Each corpus cavernosum of the penis is covered with a layer of chemical fiber membrane. Inside the corpus cavernosum of the penis is a posterior capsule composed of connective tissue and smooth muscle. The space between the posterior capsule is called the corpus cavernosum cavity of the penis. The corpus cavernosum cavity of the penis is interconnected with blood vessels. If the corpus cavernosum of the penis is swollen due to blood edema in the cavity, the penis will erect. Muscles adhere to the root of the corpus cavernosum of the penis to help urination, genital erection and male ejaculation. The skin of the male genitals is thin and easy to flex and stretch, which is suitable for genital erection. The skin from the body of the male genitals to the neck spreads forward to form a ring-shaped wrinkled wall that wraps around the head of the male genitals, which is called the foreskin of the penis.