Male genitalia

The testicle (testis) is a pair of gonads, which are located in the scrotum. The testicles are oval in shape and weigh 20-30 g. The egg is attached by means of the spermatic cord (funiculus spermaticus), formed by the muscles, fascia, nerves, blood and lymphatic vessels and the vas deferens.

On the back edge of each testicle is an appendage (epididymis). In the epididymis epididymis is isolated body (corpus epididymidis), head of the epididymis (caput epididymidis) and the tail of the epididymis (cauda epididymidis). Structural unit of the epididymis is a segment of the epididymis (lobuli epididymidis).

In the testis secrete the upper end (extremitas superior), the lower end (extremitas inferior), the leading edge (margo anterior). Outside the egg is covered by peritoneum, forming a closed tunica vaginalis (tunica vaginalis testis), which is located under perididymis (tunica albuginea). In the back of the testis albuginea forms a bulge, which is called the mediastinum testis (mediastinum testis). From the mediastinum into the testicular glands are directed peregorodochki (septula testis), formed by dense connective tissue and divide it into segments of pyramidal (lobli testis), whose number can vary from 100 to 300.

In Fig. 181.
Male: side view
1 - muscle membrane of the bladder;
2 - the ureter;
3 - the vas deferens;
4 - the seminal vesicle;
5 - rectum;
6 - the prostate gland;
7 - cavernosum of the penis;
8 - spongiosum of the penis;
9 - an appendage;
10 - Egg;
11 - head of the penis;
12 - foreskin
In Fig. 182.
Testis and appendix
1 - the vas deferens;
2 - the tunica vaginalis;
3 - head appendages;
4 - the body of the epididymis;
5 - the upper end of the testis;
6 - the lateral surface of the testis;
7 - tail appendage;
8 - the cutting edge of the testis;
9 - the lower end of the testis
Within each lobule in the thickness of the loose connective tissue, peppered with lots of blood vessels that are 4.2 convoluted seminiferous tubules (tubuli seminiferi contorti). The walls of the seminiferous tubules from the inner side lined with a special epiteliospermatogenny layer in which the formation of male sex cells, sperm, or sperm. The very process of their formation is called spermatogenesis.
In Fig. 183.
Longitudinal section of the testis
1 - testicular fascia;
2 - an appendage;
3 - mediastinum testis;
4 - slices of egg;
5 - partitions testis;
6 - albuginea;
7 - tunica vaginalis
At the exit of testicular lobules convoluted tubules pass into straight tubules (tubuli seminiferi recti), forming the rete testis (rete testis). Departs from the network efferent tubules 10-18 eggs (ductuli efferentes testis), penetrating the tunica albuginea at the head of the epididymis. Uniting to form the efferent ducts of the duct of the epididymis (ductus epididymidis), numerous tendrils which form the body and tail of the epididymis.

The vas deferens (ductus deferens) is a direct continuation of the duct of the epididymis. He is a member of the spermatic cord (funiculus spermaticus), and with it goes to the outer opening of the inguinal canal. After leaving the canal bends sharply deferens and goes down into the pelvic cavity, down to its lateral wall to the bottom of the bladder. Getting into the interior of the prostate gland, vas deferens becomes thinner and moves in a narrow tubule, which merges with the excretory duct of seminal vesicle, and together they form a single ejaculatory duct (ductus ejaculatorius) (Fig. 185). Ejaculatory duct, which passes obliquely posterior part of the prostate, called prostatic part of urethra.

The seminal vesicles (vesiculae seminales) is a tubular formation, located on the rear wall of the bladder above the prostate gland, outwards from the vas deferens, and are characterized by a large number of protrusions and bends. Their length is 10-12 cm

The cavity of the seminal vesicle is covered with numerous winding cameras, which produce liquid protein involved in the formation of sperm. Excretory duct of seminal vesicle (ductus excretorius) is involved in the formation of ejaculatory duct.

In Fig. 184.
The prostate and seminal vesicles
1 - the vas deferens;
2 - the seminal vesicles;
3 - excretory duct of seminal vesicle;
4 - the base of the prostate;
5 - Medial share of the prostate;
6 - the right lobe of the prostate;
7 - Left lobe of the prostate;
8 - the urethra;
9 - anterior surface of the prostate;
10 - inferolateral surface of prostate cancer;
11 - apex of the prostate

The prostate (prostata) is an iron-muscular organ, lies at the bottom of the pelvis below the bladder and surrounds the initial division of the urethra. Its front surface of the prostate gland adjacent to the urogenital diaphragm, back - to the rectum and the lateral surface of the gland adjacent to the muscle that raises the anus.

In the prostate gland secrete base of the prostate (basis prostatae), tip (apex prostatae), as well as the right (lobus dexter prostatae), left (lobus sinister prostatae) and medial (lobus medius prostatae) share of the prostate gland. Contained in the prostate gland numerous tubular-alveolar glands, which form part of the glandular organ, produce a secret part of the sperm ducts, and worketh in the urethra. The muscular part of the body is called the prostatic muscle and is involved in ejaculation.

On either side of the prostate contained in Part urinary channel emissivity of prostate utricle and ejaculatory ducts open up numerous openings pin prostate groove.

bulbourethrales) are located in the perineal region, at the end of the cavernous bulb of the penis. Bulbourethral gland ducts open into the spongy part of urethra.

The scrotum (scrotum) refers to the external male genitals and a skin-muscular sac, which contains the testicles with appendages. In addition, there are lower parts of the spermatic cord. Scrotal septum cavity is divided into two halves, each of which is a container for one testicle. The wall of the scrotum is formed by the same layers as the anterior abdominal wall.

Penis (penis) is a copulatory organ. It consists of cavernous bodies and contains the urethra.

Allocate the root of the penis (radix penis) which formed the rear division, attach to the front surface of the pubic bone, the body of the penis (corpus penis) and head (glans penis) At the top of the head is the external opening of the urethra. The body of the penis is formed by three cavernous bodies, of which two pairs - upper (corpus cavernosum penis), and one - unpaired lower. The lower body is called the spongy body of the penis (corpus spongiosum penis). It has the shape of the bulb, slightly thickened posteriorly, and covered by the muscle of the perineum. Front ends spongy body head member, which is a continuation of the narrowed end of the top two cavernous bodies. Inside the spongy body is the urethra, a widening of the head and forming the scaphoid fossa.

Structural basis of the cavernous bodies is a specific spongy tissue, which is a distinctive feature - multiple spaces that can absorb the blood, so spongy tissue becomes rigid. When blood flow to tissues decreases.

The skin of the penis is thin and flexible. When moving to the head, it forms a double fold called the foreskin (preputium).





List of Abbreviations

a., aa. — arteria, arteriae (artery, the artery)

lig., ligg. — ligamentum, ligamenta (ligament, the ligaments)

m., mm. — musculus, musculi (muscle, the muscle)

n., nn. — nervus, nervi (nerve, the nerve)

r., rr. — ramus, rami (branch)

s. — seu (or)

v., vv. — vena, venae (vienna)