Scrotum , Testes and prostate
General Histological
Structure
Histologic Section of Scrotum
The scrotal skin is typical skin with an overlying
epidermis and underlying tunica dartos, or
subcutaneous layer, that contains smooth
muscle which forms the scrotal septum.
A-Dermis.
B- Epidermis
C-Separation artifact.
A-Dermis.
C-Hair.
E-Hair follicle.
G-Sweat gland.
B- Epidermis.
D-Hair bulb.
F-Sebaceous gland.
Histologic Section of Testes
The testes are comprised of two main areas:
1- Connective tissue layers.
2-Vascular layers.
* That associate and penetrate into the testes.
The testes are comprised of two
main layers
A- tunica vaginalis .
It is includes the parietal and visceral lamina
layers .
B- tunica albuginea.
which is composed of dense, irregular
connective tissue (DICCT) .
TESTES
A-Tunica albuginea.
B- Tunica vasculosa.
C-Tunica septulum.
TESTES
A- parietal lamina of vaginal tunic.
B- viscral lamina of vaginal tunic.
C- Tunica albuginea.
The Convoluted comprised of stratified
spermatogenic epithelium with two main cell-
types:
A- Sertoli (Sustentacular) cells.
Functions : support, protect, and nourish the
developing germ cells and produce androgen
binding protein (ABP) and inhibin in response
to Follicle Stimulating Hormone (FSH).
B- spermatogenic cells .
Functions: . produce the spermatozoa .
( B)
A- Sertoli (Sustentacular) cells.
B- spermatogenic cells .
(A)
Interstitial (Leydig) Cells
located in the interstitium of the testis between
the convoluted seminiferous tubules. Boars
and stallions have the greatest number of
Leydig cells compared to other domestic
animal species.
Functions :
produce testosterone and some estrogen in
adult animals. responsible to interstitial cell
stimulating hormone (ICSH),
Interstitial (Leydig)
Cells
Interstitial (Leydig) Cells
Rete testes in mediastinum
-.
A-rete testis in mediastinum.
(simple squamous to columnar)
B- mediastinum.
Seminiferous tubule.
The Parenchyma of the Testis is made up of various
tubules lobules, or ductules. which produce
the spermatozoa .
225
Efferent Ductule
A- Cilia Cells.
B- Spermatozoa.
224
Testis
A- Rete testis.
B Seminiferous tubule.
C- Straight tubule.
D-Tunica albuginea.
224
Junction of Rete Testis and Efferent
A- Cilia cells.
B- Efferent ductule.
C- Rete testis.
D- Spermatozoa
215
Efferent Ductules, Stallion.
A- Columnar epithelium.
B- Pseudoslrotified epithelium.
C- Spermatozoa.
224
Straight Tubule, Testis
A- Seminiferous tubule.
B- Sertali cell, nucleus.
C- Siraight tubule.
D-Tunica albuginea.
225
Vas Deferens, Distal
A- Pseudostratified epithelium.
B- Smooth muscle.
C- Spermatozoa
Cauda epididymis
A- collections of spermatozoa in the ductus
epididymis.
B- one epididymal tubule or ductule.
Head of epididymis,stallion
A. 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.
215at
Junction of rete testis & efferent
ductule ,stalion
A. Cuboidal epithelium.
B- Pseudostrolified epithelium, efferent ductule.
C- Spermatozoa.
216
Tail of Epididymis, Stallion
A- 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)
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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 glands
-
-
Lined by simple cuboidal to low columnar epithelium
with apical blebs .
Function
The alkaline product buffers the spermatozoa.
Prostate glands.
A- tubuloalveolar prostatic glands .
218
Body of the Prostate.
A- Capsule.
B- Gland.
C- Trabecula.
Prostate& prostatic urethra.
A-uterus masculinis.
B-ductus deferens.
C-epithelial lining of urethra.
REFERNCE
1. Comparative Reproductive Biology.
(©2007 Blackwell Publishing.)
2.color atlas of veterinary histology
( © 2000 Lippincott Williams & Wilkins)
3.The anatomy of the domestic animals.