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Male genital organs

ScrotumTestisEpididymidesSpermatic cord

Vas DefernsSeminal vesiclesEjaculatory duct

ProstateProstatic urethraPenis

Scrotum

It is a pouch of lower part of anterior

abdominal wall

It contains testis-epididymides-lower part of

spermatic cord

Layers of scrotum

1-Skin : Wrinkled-pigmented skin

In the midline,there is a line of fusion of 2

lateral labioscrotal

Swellings (corresponding to labia majora)

2-Superficial fascia

Fatty superficial fascia in the abdomen is

replaced in the scrotum by dartos muscle

Membranous layer of superficial fascia in

scrotum is called (colles fascia)

3-Spermatic fascia

-External spermatic fascia is derived fromexternal oblique

muscle

-Cremastric fascia is derived from internal

oblique muscle

-Internal spermatic fascia is derived from

fascia transversalis

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muscle

Lymphatic drainage: Into superficial

inguinal lymph nodes

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Testis

Mobile organ lies within scrotum

Left testis lies at lower level than right

Each testis is surrounded by fibrous

capsule(Tunica albuginea)

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Tunica albuginea sends septa to divide the

testis into lobules

Each lobule contains 13 coiled seminiferous

tubules

Tubules open into network of channels called

rete testis

Efferent ductules connect rete testis to upper

end of epididymis

Epididymis

Lies posterior to testis

Vas deferens lying on its medial side

It consists of coiled tube (20 feet)

It consists of 3 regions (headbodytail)

Sinus of epididymis lies on lateral side

Tube emerges from tail of epididymis to form

(vas Deferens)

Blood supply:

1-Testicular artery (from aorta)

2-Testicular vein emeges from testis &

epididymis to form venous network

(pampiniform plexus)

--Right testicular vein drains into inferior

vena cava

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--Left testicular vein drains into left renal

vein

Lymphatic drainage :

Lymph from testis ascends in spermatic cord

& ends in para-aortic lymph nodes

Spermatic cord It is a collection of structures that passthrough inguinal canal

It begins at deep inguinal ring & ends atthe testis

It consists of

Testicular artery3 vessels Testicular vein

Testicular lymph vessel

Genital branch ofgenitofemoral nerve2 nerves

Autonomic nerve

Vas deferens(ductusdeferens)2 other things

Processesvaginalis(peritoneal diverticulum)

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Covering of spermatic cord

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External spermatic fasciaCremastric fasciaInternal spermatic fascia

Vas Deferens

Thick walled tube (45cm) It conveys sperm from epididymis toejaculatory duct & urethra It arises from tail of epididymis & passesthrough inguinal canal

It emerges from deep inguinal ring &enters the pelvic cavity

It crosses the ureterthen runs medially& downward on posterior surface of bladder Terminal part of vas deferens is dilatedto form Ampulla of vas deferens Inferior end of ampulla joins the seminalvesicle to form ejaculatory duct

Seminal vesicles

Two lobulated organs about (5cm long) lieon posterior surface of bladder

Each seminal vesicle consists of coiledtube embedded in connective tissue

Blood supply :1-ArteryInferior vesicle

Middle rectal2-Veindrains into internal iliac vein Lymphatic drainage : into internal iliaclymph nodes Function : it produces secretion to nourish

the sperms

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Ejaculatory duct It is 2.5 cm long

It pierces posterior surface of prostate &opens into prostatic urethra

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Function : It produces milky alkalinesecretion to neutralize acidity of vagina

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Blood supply :1-inferior vesicle art.2-Middle rectal art.

Prostatic urethra It is 3 cm long

It is the widest part of male urethra On posterior wall, there is longitudinalridge called (urethral crest) On either sides of crest, there is groovecalled prostatic sinus On the summit of urethral crest is adepression called prostatic utricle

Penis

Consists ofrootbodyglansRoot : Consists of 3 masses of erectiletissues(bulb of penis

Right&Left crura of Penis)

Bulb of penis is covered bybulbospongiosus muscle

Crura of penis is covered byischiocavernosus muscle

Body : Free part of penisconsists of 3 masses2 dorsal masses(corpora cavernosa)1 ventral mass (corpus spongiosum)

Glans : Distal expanded part of corpusspongiosum

Base of glans is called corona Prepuce (foreskin)fold of skin coversthe glans

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