animal / dairy science 434
DESCRIPTION
Animal / Dairy Science 434. Comparative Male Anatomy. Testis. SpeciesTestis Wt. % OfOrientation (grams) Body Wt. bull 300+.03 vertical ram 250.3 vertical boar 350.2 oblique stallion 200.03 horizontal dog 25.2 oblique - PowerPoint PPT PresentationTRANSCRIPT
Animal / Dairy Science 434Animal / Dairy Science 434Comparative Male AnatomyComparative Male Anatomy
TestisSpecies Testis Wt. % Of Orientation
(grams) Body Wt.
bull 300+ .03 vertical
ram 250 .3 vertical
boar 350 .2 oblique
stallion 200 .03 horizontal
dog 25 .2 oblique
rabbit 2.5 .1 vertical
human 25 .03 vertical
Reproductive Organs of the
Bull
Cowpers Gland
Caput Epididymis
Cauda EpididymisTestis
Scrotum
GlansPenis
Bladder
Ampulla
Seminal Vesicles
ProstateRectum
Vas Deferens
Gubernaculum
SigmoidFlexure
Retractor Penis
Muscle
Prepuce
Reproductive Organs of the
Bull
Vertical
Ram
Vertical
Boar
Oblique
Dog
Oblique
Stallion
Horizontal
HumanVertical
Testis Orientation
Tail Head
Bull
TestisSpecies Testis Wt. % Of Orientation
(grams) Body Wt.
bull 300+ .03 vertical
ram 250 .3 vertical
boar 350 .2 oblique
stallion 200 .03 horizontal
dog 25 .2 oblique
rabbit 2.5 .1 vertical
human 25 .03 vertical
Ram
No Body of the Prostate
Ampulla
SeminalVesicles
Prostate
BulbospongiosusMuscle
Cowper’s
Gland
Bladder
Vas Defere
ns
Pelvic Urethral Muscle
No AmpullaLarge Cowper’s
SeminalVesicles
BulbospongiosusMuscle
Cowper’s Gland
Vas Deferens
Pelvic Urethral Muscle
Prostate
No DisseminateProstate
SeminalVesicles
BulbospongiosusMuscle
Cowper’s Gland
Vas Deferens Pelvic Urethral Muscle
Prostate
Ampulla
Human
No DisseminateProstate
Dog Pelvic Tract
Prostate
Vas Defere
ns
Bladder
Pelvic Urethral Muscle
BulbospongiosusMuscle
No Seminal Vesicles or Disseminate Prostate
Cat (Tom) Reproductive Tract
ProstateCowper’s Gland
Glans Penis
Corpus Cavernosum
Crus Penis
Vas Deferens
AmpullaNo 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 GlandsSpecies Seminal Prostate Cowper's
Vesicles body disseminate
bull ++ + + +
ram + - + ++
boar +++ + + +++
stallion +++ ++ - (+) +
dog - ++ - -
Cat - ++ - ++
human + ++ - +
Accessory Gland SecretionsSpecies Seminal
VesiclesProstate
Body+ DisseminateCowper’s
bull 30 6ram 8 6boar 30 40 30
stallion 30dog 70
human 70 25
GelGel
Clot Clot Enzyme
Penis TypesMuscular-Vascular Fibroelastic
Human Penis Cross Section
Corpus Cavernosum
Corpus SpongiosumUrethra
Blood Vessels
Large Veins
InternalPrepuce Raphe
UrethralProcess
Free End of Penis GlansPenis
FiliformAppendage
Bull
Ram
Boar
Stallion
Human
Cat
Comparison of Penis Types
Human
Sigmoid Flexure
Bull
Boar
Fibroelastic Penis
Muscular-Vascular
Penis Type
Stallion
The Penis
Erection and Ejaculation Characteristics
Species Speed of Ejaculate Semen Sperm SpermErection Time Volume Conc. Number
bull rapid short medium medium- mediumhigh
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 numbersLarge accessory glands = large volume of the ejaculate with lower concentration of sperm
»Support spermatogenesis
»Testosterone synthesis
PrimarySpermatocyte
Sertoli Cells
Leydig Cells
Capillary
BasementMembrane
Spermatids
Round Spermatids
SecondarySpermatocyte
Myoid Cells
SeminiferousTubule
SeminiferousTubule
Spermatogonium
Seminiferous Tubules
Seminiferous Tubule
Sertoli CellSertoli Cell
Leydig Cell
Capillary
Interstitial Tissue (space)
Capillary
LeydigCells
Basal CellPrincipal Cell Stereo-Cillia
Epididymis
Cauda Epididymis near Vas Deferens
Vas Deferens
Smooth Muscle
Sperm