Testis epididymis vas deferens and spermatic cord
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Testis, epididymis, vas deferens and spermatic cord. OBJECTIVES. OBJECTIVES. I- Primary Sex Organ: Testis. II- Reproductive Tract: Epididymis. Vas Deferens. Spermatic cord. III- Accessory Sex Glands: Seminal vesicles. Prostate gland. Bulbourethral glands.

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Testis, epididymis, vas deferens and spermatic cord

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Testis epididymis vas deferens and spermatic cord

Testis, epididymis, vas deferens and spermatic cord


Objectives

OBJECTIVES


Objectives1

OBJECTIVES


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

Components of Male Reproductive System


Scrotum

Scrotum

T

L

The scrotum is a cutaneous sac consisting of two layers: heavily pigmented skin and closely related dartosfascia

It is divided into two compartments which are distinguished externally by a middle ridge called the raphe. Internally, the raphe connects to a muscular partition, the septum, which serves to divide the scrotum into its two areas

The Left scrotum is lower than the right.


Testis epididymis vas deferens and spermatic cord

  • Contents:

    One testis and one epididymis in each compartment

  • Functions:

    • Houses & Protects the testis

    • Regulates testicular temperature

    • It has thin skin with sparse hairs and sweat glands.

    • The Dartos muscle lies within the superficial fascia.


Testis epididymis vas deferens and spermatic cord

  • The arterial supply of the scrotum :

    1- Posterior scrotal branches of the perineal artery, a branch of the internal pudendal artery.

    2- Anterior scrotal branches of the deep external pudendal artery, a branch of the femoral artery.

    3- Cremastericartery, a branch of the inferior epigastric artery.


Testis epididymis vas deferens and spermatic cord

  • Scrotal veins accompany the arteries

  • Lymphatic vessels of the scrotum drain into the superficial inguinal lymph nodes


Testis epididymis vas deferens and spermatic cord

  • The nerves of the scrotum include the:

  • Genital branch of the genitofemoral nerve (L1, L2) supplying the anterolateral surface.

  • Anterior scrotal nerves, branches of the ilioinguinal nerve (L1) supplying the anterior surface.

  • Posterior scrotal nerves, branches of the perineal branch of the pudendal nerve (S2- S4) supplying the posterior surface.

  • Perineal branches of the posterior femoral cutaneous nerve (S2, S3) supplying the inferior surface.


Testis

Paired almond-shape gonads that are suspended in the scrotum by the spermatic cord

4 - 5 cm long

Weigh (10.5 – 14) g Functions:

Spermatogenesis.

Hormone production

(Androgens- testosterone).

Testis

sc

T


Testis epididymis vas deferens and spermatic cord

-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).


Testis epididymis vas deferens and spermatic cord

(Leydig cells)

TESTIS


Coverings of the testis

Coverings of the Testis

TV

Tunica Vaginalis:

Peritoneal covering, formed of parietal and visceral layers.

It surrounds testis & epididymis.

It allows free movement of testis inside scrotum.

Tunica albugenia

It is a whitish fibrous capsule


Internal structure of testis

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

Blood Supply of Testis

Testicular Artery

Testicular artery:

It is a direct branch from the abdominal aorta.

Venous drainage :

(Pampiniform plexus of veins.

Approximately a dozen veins which forms a network in the spermatic cord.

They become larger, converge as it approached the inguinal canal and form the Testicular vein.


Testis epididymis vas deferens and spermatic cord

Right Vein drains into IVC.

Left 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

Epididymis

H

V D

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 Headreceives efferent ductules from testis.

The Tail is continuous with Vas Deferens

B

T


Testis epididymis vas deferens and spermatic cord

  • 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 crossesthe ureter

Its terminal part is dilated to form the Ampulla of the vas

It joins the urethra in the prostate

Vas Deferens


Testis epididymis vas deferens and spermatic cord

Thank you


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