Transcript Powerpoint_4_13

Animal / Dairy Science 434
Comparative Male Anatomy
Testis
Species
Testis Wt.
(grams)
% Of
Body Wt.
bull
300+
.03
vertical
ram
250
.3
vertical
boar
350
.2
oblique
stallion
200
.03
horizontal
25
.2
oblique
.1
vertical
.03
vertical
dog
rabbit
human
2.5
25
Orientation
Reproductive
Organs of the
Bull
Rectum
Seminal Vesicles
Prostate
Cowpers
Gland
Ampulla
Bladder
Vas Deferens
Glans
Penis
Retractor
Penis
Muscle
Sigmoid
Flexure
Caput Epididymis
Scrotum
Prepuce
Testis
Gubernaculum
Cauda Epididymis
Reproductive
Organs of the
Bull
Vertical
Ram
Vertical
Boar
Oblique
Dog
Oblique
Stallion
Horizontal
Human
Vertical
Testis Orientation
Bull
Tail
Head
Testis
Species
Testis Wt.
(grams)
% Of
Body Wt.
bull
300+
.03
vertical
ram
250
.3
vertical
boar
350
.2
oblique
stallion
200
.03
horizontal
25
.2
oblique
.1
vertical
.03
vertical
dog
rabbit
human
2.5
25
Orientation
Seminal
Vesicles
Ram
Ampulla
Bladder
Vas
Deferens
Pelvic
Urethral
Muscle
Cowper’s
Gland
Prostate
Bulbospongiosus
Muscle
No Body of the Prostate
Cowper’s Gland
Seminal
Vesicles
Prostate
Vas
Deferens
No Ampulla
Large Cowper’s
Bulbospongiosus
Muscle
Pelvic Urethral Muscle
Seminal
Vesicles
Prostate
Cowper’s Gland
Ampulla
No Disseminate
Prostate
Vas Deferens
Bulbospongiosus
Muscle
Pelvic Urethral Muscle
Human
No Disseminate
Prostate
Dog Pelvic Tract
No Seminal Vesicles or
Disseminate Prostate
Prostate
Pelvic
Urethral
Muscle
Bladder
Vas
Deferens
Bulbospongiosus
Muscle
Cat (Tom) Reproductive Tract
Vas Deferens
Prostate
Cowper’s Gland
Corpus Cavernosum
Crus Penis
Ampulla
Glans Penis
No Seminal Vesicles or Disseminate Prostate
Cat (Tom)
Reproductive
Tract
Note how close the
cowper’s gland is to the
penis in the cat.
Cat Glans Penis
Feline Anatomy:
Erection and
Mating
Accessory Glands
Species
Seminal
Prostate
Cowper's
Vesicles
body
disseminate
bull
++
+
+
+
ram
+
-
+
++
boar
+++
+
+
+++
stallion
+++
++
- (+)
+
dog
-
++
-
-
Cat
-
++
-
++
human
+
++
-
+
Accessory Gland Secretions
Species
Seminal
Vesicles
bull
ram
boar
stallion
dog
human
30
8
30
Gel
70 Clot
Prostate
Body+ Disseminate
Cowper’s
6
6
40
30
70
25 Clot Enzyme
30 Gel
Penis Types
Muscular-Vascular
Fibroelastic
Human Penis Cross Section
Blood Vessels
Corpus Cavernosum
Large Veins
Corpus Spongiosum
Urethra
Internal
Prepuce
Raphe
Urethral
Process
Stallion
Bull
Free End of Penis
Glans
Penis
Human
Filiform
Appendage
Ram
Cat
Boar
Comparison of Penis Types
Human
Sigmoid Flexure
Boar
Bull
Fibroelastic Penis
MuscularVascular
Penis Type
Stallion
The Penis
Species
Sigmoid
Flexure
Type
Erectile
Tissue
Glans
bull
yes
FE
+
Glans
ram
yes
FE
+
Glans
boar
yes
FE
+
not distinct
stallion
no
MV
+++
Large Glans
dog
no
MV
+++
Large Glans
human
no
MV
+++
Large Glans
Erection and Ejaculation
Characteristics
Species Speed of Ejaculate Semen
Erection
Time
Volume
Sperm
Conc.
Sperm
Number
bull
rapid
short
medium
mediumhigh
medium
ram
rapid
short
small
high
medium
boar
rapid
long
large
low
high
stallion
slow
moderate
large
low
medium
dog
slow
long
large
low
low
human
slow
moderate
medium
low
low
Large Testes = high sperm numbers
Large accessory glands = large volume of the ejaculate with lower
concentration of sperm
Seminiferous
Tubule
Primary
Spermatocyte
Spermatogonium
Sertoli Cells
»Support
spermatogenesis
Myoid Cells
Secondary
Spermatocyte
Leydig Cells
»Testosterone
synthesis
Round Spermatids
Spermatids
Basement
Membrane
Capillary
Seminiferous Tubules
Seminiferous Tubule
Sertoli Cell
Sertoli Cell
Interstitial Tissue (space)
Capillary
Leydig Cell
Capillary
Leydig
Cells
Epididymis
Principal Cell
Basal Cell Stereo-Cillia
Cauda Epididymis near Vas Deferens
Sperm
Smooth Muscle
Vas Deferens