Animal / Dairy Science 434TestisReproductive Organs of the BullRamBoarDogPowerPoint PresentationHumanTestis OrientationSlide 10Slide 11Slide 12Slide 13Slide 14Slide 15Dog Pelvic TractSlide 17Cat (Tom) Reproductive TractSlide 19Cat Glans PenisFeline Anatomy: Erection and MatingAccessory GlandsAccessory Gland SecretionsPenis TypesHuman Penis Cross SectionSlide 26Comparison of Penis TypesSlide 28Sigmoid FlexureMuscular-Vascular Penis TypeThe PenisErection and Ejaculation CharacteristicsSlide 33Slide 34Slide 35Slide 36Slide 37Slide 38Slide 39Slide 40Slide 41Slide 42Slide 43Animal / Dairy Science 434Animal / Dairy Science 434Lec 4: Comparative Male AnatomyLec 4: Comparative Male AnatomyTestisSpecies Testis Wt. % Of Orientation (grams) Body Wt.bull 300+ .03 verticalram 250 .3 verticalboar 350 .2 obliquestallion 200 .03 horizontaldog 25 .2 obliquerabbit 2.5 .1 verticalhuman 25 .03 verticalReproductive Organs of the BullCowpers GlandCaput EpididymisCauda EpididymisTestisScrotumGlansPenisBladderAmpullaSeminal VesiclesProstateRectumVas DeferensGubernaculumSigmoidFlexureRetractor PenisMusclePrepuceRamBoarDogTestisCorpus EpididymisGubernaculumUreterAmpullaVas DeferensSpermatic CordCaput EpididymisGlans PenisRetractor Penis MuscleSeminal VesiclesProstate GlandCowper’s GlandRectumCauda EpididymisStallionHumanTestis OrientationTailHeadBullTestisSpecies Testis Wt. % Of Orientation (grams) Body Wt.bull 300+ .03 verticalram 250 .3 verticalboar 350 .2 obliquestallion 200 .03 horizontaldog 25 .2 obliquerabbit 2.5 .1 verticalhuman 25 .03 verticalRamNo Body of the ProstateAmpullaSeminalVesiclesProstateBulbospongiosusMuscleCowper’sGlandBladderVas DeferensPelvic Urethral MuscleNo AmpullaLarge Cowper’sSeminalVesiclesBulbospongiosusMuscleCowper’s GlandVas DeferensPelvic Urethral MuscleProstateNo DisseminateProstateSeminalVesiclesBulbospongiosusMuscleCowper’s GlandVas DeferensPelvic Urethral MuscleProstateAmpullaHumanNo DisseminateProstateDog Pelvic TractProstateVas DeferensBladderPelvic Urethral MuscleBulbospongiosusMuscleCat (Tom) Reproductive TractProstateCowper’s GlandGlans PenisCorpus CavernosumCrus PenisVas DeferensAmpullaCat (Tom) Reproductive TractNote how close the cowper’s gland is to the penis in the cat.Cat Glans PenisFeline Anatomy: Erection and MatingAccessory GlandsSpecies Seminal Prostate Cowper'sVesicles body disseminatebull ++ + + +ram + - + ++ boar +++ + + +++stallion +++ ++ - (+) +dog - ++ - -Cat - ++ - ++human + ++ - +Accessory Gland SecretionsSpecies SeminalVesiclesProstateBody+ DisseminateCowper’sbull 30 6ram 8 6boar 30 40 30stallion 30dog 70human 70 25GelGelClotClot EnzymePenis TypesMuscular-VascularFibroelasticHuman Penis Cross SectionCorpus CavernosumCorpus SpongiosumUrethraBlood VesselsLarge VeinsInternalPrepuceRapheUrethralProcessFree End of PenisGlansPenisFiliformAppendageBullRamBoarStallionHumanCatComparison of Penis TypesHumanSigmoid FlexureBullBoarFibroelastic PenisMuscular-Vascular Penis TypeStallionThe PenisSpecies Sigmoid FlexureType Erectile TissueGlansbull yes FE + Glansram yes FE + Glansboar yes FE + not distinctstallion no MV +++ Large Glansdog no MV +++ Large Glanshuman no MV +++ Large GlansErection and Ejaculation CharacteristicsSpecies Speed of Ejaculate Semen Sperm SpermErection Time Volume Conc. Numberbull rapid short medium medium- mediumhighram rapid short small high mediumboar rapid long large low highstallion slow moderate large low mediumdog slow long large low lowhuman slow moderate medium low lowLarge Testes = high sperm numbersLarge accessory glands = large volume of the ejaculate with lower concentration of sperm»Support spermatogenesis»Testosterone synthesisPrimarySpermatocyteSertoli CellsLeydig CellsCapillaryBasementMembraneSpermatidsRound SpermatidsSecondarySpermatocyteMyoid CellsSeminiferousTubuleSeminiferousTubuleSpermatogoniumSeminiferous TubulesSeminiferous TubuleSertoli CellSertoli CellLeydig CellCapillaryInterstitial Tissue (space)CapillaryLeydigCellsBasal CellPrincipal CellStereo-CilliaEpididymisCauda Epididymis near Vas DeferensVas DeferensSmooth
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