lec3_13雄性动物生殖

nullAnimal/Dairy Science 434 Animal/Dairy Science 434 Male Reproductive Tract AnatomyLearning ObjectivesLearning ObjectivesTo be able to describe the male reproductive system in the bull. Structure FunctionnullFactory 1-25 X 109 sperm/day “Plant” must be air conditionedWarehouse and Delivery Storage 10-50 X 109 sperm Sperm for 5-10 ejaculates Smooth muscle contractions upon sexual stimulationFinishing School Fluid Absorption 8-25 X 109 sperm membrane changes nuclear & flagellar stabilization motility, fertility cytoplasmic droplet translocationDelivery System Erection Protrusion EjaculationAlterations & Packaging Metabolic substrates Surface coatings Transport for spermTestisEpididymisTail of EpididymisAccessory Sex GlandsPenisBull Reproductive TractBull Reproductive TractReproductive Organs of the BullReproductive Organs of the BullReproductive Organs of the BullReproductive Organs of the BullPrimary Sex OrganBull TestisBull TestisBull TractBull TractThermosensor Radiator Protective sacBull TractBull TractCross SectionLongitudinal SectionScrotal Cross SectionScrotal Cross SectionScrotal Longitudinal Section Scrotal Longitudinal Section Structure of the TestisStructure of the TestisThe TestisThe TestisMediastinumSeminiferous TubuleRete TestisStructure of the TestisStructure of the TestisRete Testis (within the mediastinum)Tunica AlbugineaSeminiferous TubuleStructure of the TestisStructure of the TestisVasectomySecondary Sex OrgansStructure of the TestisStructure of the TestisRete Testis (within the mediastinum)Tunica AlbugineaCauda EpididymisSeminiferous TubuleVasectomySpermatic ChordPampiniform PlexusTesticular ArterySpermatic ChordPampiniform Plexus Counter Current Exchange 39°C - 34°C 70 ng T/ml - 4.8 ng T/mlVascular, lymphatic and nerves Heat exchanger Houses cremaster muscleTestis Arterial PulseTestis Arterial PulseSpermatic ArteryTesticular ArteryPampiniform PlexusTesticular ArterySpermatic ChordSpermatic ChordPampiniform PlexusBull TractBull TractContraction of the Tunica DartosContraction of the Tunica DartosTunica Dartos Smooth muscle Androgen dependent (Testosterone)TestisBull TractBull TractBull TractBull TractPelvic GenitaliaPelvic Genitalia of the BullPelvic Genitalia of the BullPelvic Urethra MuscleBullBullBulb of the PenisBulb of the PenisReproductive Organs of the BullReproductive Organs of the BullCowpers GlandCaput EpididymisCauda EpididymisTestisScrotumGlans PenisBladderAmpullaSeminal VesiclesProstateRectumVas DeferensGubernaculumCross Section of Bull PenisCross Section of Bull PenisPenis Cross SectionPenis Cross SectionGlans Penis of the BullGlans Penis of the BullFree Part of PenisGlans PenisRapheUrethral ProcessPrepuce (Retracted)Glans PenisGlans PenisFree Part of PenisGlans PenisRapheUrethral ProcessPrepuce (Retracted)Arterial SupplyArterial SupplynullReproductive Organs of the BullCowpers GlandCaput EpididymisCauda EpididymisTestisScrotumGlans PenisBladderAmpullaSeminal VesiclesProstateRectumVas DeferensGubernaculumSigmoid FlexureRetractor Penis MusclePrepuce