animal diary science 434
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Animal/Dairy Science 434Lec 3:
Male Reproductive Tract Anatomy
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Learning Objectives
To be able to describe the malereproductive system in the bull. Structure Function
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Factory 1-25 X 109sperm/day Plant must be air
conditioned
Factory 1-25 X 109sperm/day Plant must be air
conditioned
Warehouse and Delivery Storage 10-50 X 109sperm Sperm for 5-10 ejaculates Smooth muscle contractions
upon sexual stimulation
Warehouse and Delivery Storage 10-50 X 109sperm
Sperm for 5-10 ejaculates Smooth muscle contractions
upon sexual stimulation
Finishing School Fluid Absorption 8-25 X 109sperm
membrane changes nuclear & flagellar
stabilization motility, fertility cytoplasmic droplet
translocation
Finishing School Fluid Absorption 8-25 X 109sperm
membrane changes nuclear & flagellar
stabilization motility, fertility cytoplasmic droplet
translocationDelivery System
Erection Protrusion Ejaculation
Delivery System Erection Protrusion Ejaculation
Alterations & Packaging Metabolic substrates Surface coatings Transport for sperm
Alterations & Packaging Metabolic substrates Surface coatings
Transport for sperm
Testis Epididymis
Tail of Epididymis
Accessory Sex Glands
Penis
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BullReproductive
Tract
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ReproductiveOrgans of the
Bull
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ReproductiveOrgans of the
Bull
Testis
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Bull Testis
Tunica Vaginalis parietal
visceral
Tunica Albuginea
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Bull Tract
Scrotum
Thermosensor Radiator
Protective sac
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Bull Tract
Cross Section
Longitudinal Section
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ScrotalCross Section
testicular parenchyma
mediastinum
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Testis
Testicular Parenchyma
Mediastinum
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Structure ofthe Testis
Rete Testis
(within the mediastinum)
Tunica Albuginea
Seminiferous Tubule
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Mediastinum
SeminiferousTubule
Rete Testis
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Structure ofthe Testis
Rete Testis
(within the mediastinum)
Tunica Albuginea
Seminiferous Tubule
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Structure ofthe Testis
Vas Efferentia
6-12 tubules
a!ut E!idid"mis
auda E!idid"mis
or!us
E!idid"mis
Vas #eferens
S!ermatic ord
Vasectomy
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Structure ofthe Testis
Rete Testis
(within the mediastinum)
Tunica Albuginea
Vas Efferentia
6-12 tubules
a!ut E!idid"mis
auda E!idid"mis
or!us
E!idid"mis
Seminiferous Tubule
Vas #eferens
S!ermatic ord
Vasectomy
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$am!iniform
$le%us
TesticularArter"
Spermatic Chord
Pampiniform Plexus Counter Current Exchange 39C - 34C 70 ng T/ml - 4.8 ng T/ml
Vascular, lymphatic and nerves
Heat exchanger
Houses cremaster muscle
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Testis ArterialPulse
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Bull Tract
Tunica Dartos
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Contraction of the Tunica Dartos
Tunica Dartos
Smooth muscle
Androgen dependent(Testosterone)
Testis
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Bull Tract
Gubernaculum
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Bull Tract
Pelvic Genitalia
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Pelvic Genitalia of the Bull
Pelvic UrethraMuscle
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Bulb of the Penis
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ReproductiveOrgans of the
Bull
CowpersGland
Caput Epididymis
Cauda EpididymisTestis
ScrotumGlansPenis
Bladder
Ampulla
Seminal Vesicles
Prostate
Rectum
Vas Deferens
Gubernaculum
SigmoidFlexure
RetractorPenis
Muscle
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Cross Section of Bull Penis
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Arterial Supply
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Glans Penis
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