Scrotum , Testes and prostate Scrotum , Testes and prostate

General Histological Structure

Histologic Section of ScrotumScrotum

The scrotal skin is typical skin with an overlying The scrotal skin is typical skin with an overlying epidermis and underlying epidermis and underlying tunica dartostunica dartos, or , or subcutaneous layer, that contains smooth subcutaneous layer, that contains smooth muscle which forms the scrotal septummuscle which forms the scrotal septum..

A-A-Dermis.

B- Epidermis

C-Separation artifact.

A-A-Dermis. B- Epidermis.

C-Hair. D-Hair bulb .

E-Hair follicle. F-Sebaceous gland.

G-Sweat gland.

Histologic Section of TestesTestes

The testes are comprised of twoThe testes are comprised of two main areasmain areas : :

11 - -Connective tissue layersConnective tissue layers..

22--Vascular layersVascular layers . .

* * That associate and penetrate into the testesThat associate and penetrate into the testes . .

The testes are comprised of twoThe testes are comprised of two main layersmain layers

A-A- tunica vaginalistunica vaginalis. .

It is includes the parietal and visceral lamina It is includes the parietal and visceral lamina layerslayers. .

B-B- tunica albugineatunica albuginea..

which is composed of dense, irregular which is composed of dense, irregular connective tissue (DICCT)connective tissue (DICCT). .

TESTESTESTES

A-A-Tunica albugineaalbuginea..

B- B- Tunica vasculosavasculosa..

C-C-Tunica septulum septulum..

TESTES

A- parietal lamina of vaginal tunicA- parietal lamina of vaginal tunic . .

B- viscral lamina of vaginal tunicB- viscral lamina of vaginal tunic..

C- Tunica albugineaC- Tunica albuginea . .

The Convoluted comprised of stratified The Convoluted comprised of stratified

spermatogenic epithelium with two main spermatogenic epithelium with two main cell-cell-typestypes : :

A- A- SertoliSertoli (Sustentacular) cells(Sustentacular) cells.. FunctionsFunctions : support, protect, and nourish the : support, protect, and nourish the developing germ cells and produce androgen developing germ cells and produce androgen binding protein (ABP) and inhibin in response binding protein (ABP) and inhibin in response

to Follicle Stimulating Hormone (FSH)to Follicle Stimulating Hormone (FSH) . .B- B- spermatogenic spermatogenic cellscells. .

Functions:Functions: . produce the spermatozoa . produce the spermatozoa. .

( ( BB( )( )AA))

A- A- SertoliSertoli (Sustentacular) cells(Sustentacular) cells..

B- B- spermatogenic spermatogenic cellscells. .

Interstitial (Leydig) CellsInterstitial (Leydig) Cells

located in the interstitium of the testis between located in the interstitium of the testis between the convoluted seminiferous tubules. Boars the convoluted seminiferous tubules. Boars and stallions have the greatest number of and stallions have the greatest number of Leydig cells compared to other domestic Leydig cells compared to other domestic

animal speciesanimal species . .FunctionsFunctions: :

produce testosterone and some estrogen in produce testosterone and some estrogen in adult animals. responsible to interstitial cell adult animals. responsible to interstitial cell

stimulating hormone (ICSH)stimulating hormone (ICSH) , ,

Interstitial (Leydig) CellsInterstitial (Leydig) Cells

Interstitial (Leydig) CellsInterstitial (Leydig) Cells

Rete testes in mediastinumRete testes in mediastinum

.-.-

A-rete testis in mediastinum. ((simple squamous to columnar) B- mediastinum.

Seminiferous tubule. The Parenchyma of the Testis The Parenchyma of the Testis is made up of various is made up of various

tubules lobules, or ductules. which produce tubules lobules, or ductules. which produce the spermatozoathe spermatozoa. .

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Efferent DuctuleA- Cilia Cells.B- Spermatozoa.

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TestisA- Rete testis.B Seminiferous tubule.C- Straight tubule.D-Tunica albuginea.

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Junction of Rete Testis and Efferent A- Cilia cells.

B- Efferent ductule .

C- Rete testis .

D- Spermatozoa

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Efferent Ductules, Stallion .

A- Columnar epithelium.

B- Pseudoslrotified epithelium.

C- Spermatozoa.

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Straight Tubule, Testis A- Seminiferous tubule.

B- Sertali cell, nucleus.C- Siraight tubule.D-Tunica albuginea.

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Vas Deferens, Distal A- Pseudostratified epithelium.

B- Smooth muscle.C- Spermatozoa

Cauda epididymCauda epididymiiss

A- A- collections of spermatozoa in the ductus epididymis.

B- one epididymal tubule or ductule.

Head of epididymis,stallionHead of epididymis,stallionA. loose connective tissue

B. Lymphocyte, migrating

C. Pseudoslrotified epithelium

D. Smooth muscle

Cauda epididymis. A- pseudostratifi ed columnar epithelial lining of the epididymis.B-the collection of spermatozoa in one epididymal tubule.

215at215at

Junction of rete testis & efferent Junction of rete testis & efferent ductule ,stalionductule ,stalion

A. Cuboidal epithelium.B- Pseudostrolified epithelium, efferent ductule .

C- Spermatozoa.

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Tail of Epididymis, StallionA- loose connective tissue .

B- Pseudostratified epithelium.C- Smooth muscle.D- Spermatozoa..

E- Villus-like projection.

Spermatogenic cells Spermatogonia Spermatocytes (primary and secondary) Spermatid to spermatozoa (cells are cytoplasmically connected at all stages )

Histologic Section of Prostate

All domestic animal species have a prostate, but the dog has the most prominent prostatic body surrounding the urethra

*the prostatic tissue is disseminated within the lamina propria-submucosa of the pelvic urethra. Simple cuboidal strikingly acidophilic epithelium

*Function.produce an alkaline product to neutralize the acidity of the semen, and the prostatic secretions are the bulk of the initial ejaculate.

Prostatic glandsProstatic glands- Lined by simple cuboidal to low columnar epithelium Lined by simple cuboidal to low columnar epithelium

with apical blebs .with apical blebs .- FunctionFunction- The alkaline product buffers the spermatozoa.

Prostate glandsProstate glands..

A- tubuloalveolar prostatic glandsA- tubuloalveolar prostatic glands. .

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Body of the Prostate .

A- Capsule.

B- Gland.

C- Trabecula.

Prostate& prostatic urethraProstate& prostatic urethra..

A-uterus masculinis .B-ductus deferens.C-epithelial lining of urethra.

REFERNCEREFERNCE

1 .Comparative Reproductive Biology.

©( 2007 Blackwell Publishing).

2.color atlas of veterinary histology

© (2000 Lippincott Williams & Wilkins)

3.The anatomy of the domestic animals.