Dr Rania Gabr
Dr. Safaa Ahmed
OBJECTIVES

Define the testis.

Describe its normal site, size, shape & relation.

Discuss its covering.

Discuss its blood and nerve supply.

Mention its lymphatic drainage.

Define the epididymis.

Describe its site, position & parts.

Discuss its blood and nerve supply.
OBJECTIVES

Mention its lymphatic drainage.

Define the vas deferens.

Describe its beginning and termination.

Discuss its course, relation, blood and nerve supply.

Mention its lymphatic drainage.
Enumerate the contents (structures) of the spermatic cord.
Components of Male Reproductive System
I- Primary Sex Organ:
 Testis.
II- Reproductive Tract:
 Epididymis.
 Vas Deferens.
 Spermatic cord.
III- Accessory Sex Glands:
 Seminal vesicles.
 Prostate gland.
 Bulbourethral glands.
IV- External genitalia:
 Penis
Testis
 Paired almond-shape
gonads that are
suspended in the
scrotum by the spermatic
cord
 4 - 5 cm long
 Weigh (10.5 – 14) g
sc
Functions::
 Spermatogenesis.
 Hormone production
 (Androgens-
testosterone).
T
-It develops in the abdomen;
descends into the scrotum
before birth;
-It is made up of tightly coiled
tubes (SEMINIFEROUS
TUBULES) where sperm are
formed;
-scattered between tubules
are the LEYDIG CELLS
(produce testosterone and
other androgens).
(Leydig cells)
TESTIS
Coverings of the Testis
 Tunica Vaginalis:
- It surrounds testis &
epididymis.
- Derived from the
abdominal peritoneum
- It allows free movement
of testis inside scrotum.
 Tunica albugenia:
It is a whitish fibrous
capsule
T.Vag.
Parietal &
visceral
Internal Structure of Testis
Fibrous septae extend from
the capsule, divide the testis
into a (200-300) lobules.
Each lobule contains, (1-3)
seminiferous tubules.
Seminiferous Tubules:
- They are the site of the
spermatogenesis.
- They form the bulk of
testicular tissue.
Rete testis:
- (a network of tubules)
- It is the Site of merging of
the Seminiferous tubules.
RT
Blood Supply of Testis
Testicular artery:
 It is a direct branch from
the abdominal aorta.
Testicular Artery
Venous drainage :
(Pampiniform plexus of
veins.)
- Approximately a dozen
veins which forms a
network in the spermatic
cord.
- They become larger,
converge as it approaches the
inguinal canal and form the
Testicular vein.
Right Testicular vein Vein drains
into IVC.
Left Testicular vein Vein drains
into Left Renal Vein.
Testicular Lymphatics:
Follow arteries, veins end in
Lumbar (par aortic) nodes
From scrotum, penis, prepuce:
Terminate in Superficial
Inguinal nodes
Epididymis
A Single coiled tubule
 6 M long
 Located on the
posterior & superior
margins of the testis.
 It is divided into:
Head, Body and Tail.
The Head receives efferent
ductules from testis.
The Tail is continuous with
Vas Deferens
H
V D
B
 Functions:
 1. Secretes/absorbs the nourishing
fluid.
 2. Recycles damaged spermatozoa.
 3. Stores spermatozoa Up to 2 weeks to
allow for maturation
 It is the site where sperms become
motile and gain the ability to fertilize.
Vas Deferens
 A Muscular tube 45 cm
long.
 Carries sperms from the
Epididymis to pelvic
cavity.
 Passes through the
inguinal canal
 It crosses the ureter
 Its terminal part is dilated
to form the Ampulla of
the vas
 It joins the urethra in the
prostate
Vas
deferens
Spermatic Cord
 - The spermatic cord is a
collection of structures
that pass from each testis
through the inguinal canal
to the abdominal cavity.
Coverings
 1- External spermatic fascia
 2- Cremasteric fascia
 3- Internal spermatic fascia
 Structures (Contents)
of the Spermatic Cord
1- Vas deferens
2- Testicular artery
3-Testicular veins
(pampiniform plexus)
4- Testicular lymph vessels
5- Autonomic nerves
6-Remains of the processus
vaginalis
7- Genital branch of the
genitofemoral nerve, which
supplies the cremaster muscle
 Processus Vaginalis
Is a pouch of peritoneum
that is carried into the
scrotum by the descent of
the testicle and which in
the scrotum forms the
tunica vaginalis
Thank
you