SCROTUM
Locatedoutsideofpelviccavitytopreventoverheatingoftestes.
forspermatogenesis(spermproduction)totakeplace.
Containsciliaonitscolumnarepitheliumthathelpmovesperm
EPIDIDYMIS
temperature.
Apouch-likecutaneousextensionthatcontainsthetwotestes.
Internaltemperatureofscrotumisalwaysabout3˚Fbelowbody
Anexpandedtubulefromtheretetestiswherespermisstored(for
towardvasdeferensduringejaculation.
about3days),maturedandbecomefullyfunctional.
Temperaturehastobelowerthannormalbodytemperatureinorder
EpididymiskeepsspermsforsometimesandgivesnourishmenttoDEFERENS (sperm duct or spermatic deferens).
ACCESSORY SEX GLANDS
Atubule(about10incheslong)thatconnectsepididymistothe
prostaglandins(substancesthatstimulateuterinecontractionduring
Theseminalfluidcontainsfructose(nutrientforthesperm)and
ejaculation.
Secreteanalkalinesolutionthatmakesup60%ofthesemenvolume.
SEMINALVESICLES
Containssmoothmusclethatundergoesrapidperistalsisduring
urethrafortransportingspermduringejaculation.
sexualexcitation).PROSTATEGLAND
ofsemenvolume.
BULBOURETHRALGLAND
Itsecretesaclearlubricatingfluidthataidsinsexualintercourse.
ThisfluidhelpsneutralizethepHofsemenandvaginalsecretion.
Secretesaslightlyacidic,milkywhitefluidthatmakesupabout30%
ejaculation.
Atubulelocatedinsidethepenisforurineexcretionandsemen
Containssmoothmusclethatperformsrapidperistalsisduring
ItisalsocalledCowper'sglands
URETHRA
ejaculation.ENIS
vasodilatationinthepenis,allowingerectiletissuestoswellanderect
Duringejaculation,sympatheticnervescausevasdeferens,urethraand
Acopulatoryorganthatisresponsiblefordeliveringthespermtothe
Contains2erectiletissuescalledcorpuscavernosaandcorpus
thepenis.
erectiletissuestocontract,forcefullyexpellingsemen(amixtureof
Duringsexualexcitement,parasympatheticnervescause
femalereproductivetract.
Thelatteroneenlargesandformstheglanspenis,it'sdistalend.
spongiosum.
sexglandfluidsandabout300millionsperm)outward.SEMINIFEROUS TUBULES
Betweenthetubulesarespecializedglandularcellscalledinterstitial
EJACULATORY DUCTS
cells(orLeydig'scells)whichproducetestosterone.
spermatogenesis.
About1,000seminiferoustubulesineachtestisconduct
Insidethetubulesarespecializedcellscalledsertoli'scellswhich
theseminalvesicle.
Therearetwoejaculatoryducts.
Eachreceivesspermfromtheductusdeferensandthesecretionsof
supportandnourishthesperm.
Bothejaculatoryductsemptyintothesingleurethra.