The male reproductive system

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1、ThemalereproductivesystemThemalereproductivesystemcontainstheseparts:testes(pronounced"test-eez")glandsspermductsurethrapenis.TestesThetwotestes(oneofthemiscalledatestis)arecontainedinabagofskincalledthescrotum.Theyhavetwofunctions:toproducemillionsofma

2、lesexcellscalledspermtomakemalesexhormones,whichaffectthewayaman'sbodydevelops.SpermductandglandsThespermpassthroughthespermducts,andmixwithfluidsproducedbytheglands.Thefluidsprovidethespermcellswithnutrients.Themixtureofspermandfluidsiscalledsemen.Peni

3、sandurethraThepenishastwofunctions:topassurineoutoftheman'sbodytopasssemenintothevaginaofawomanduringsexualintercourse.Theurethraisthetubeinsidethepenisthatcancarryurineorsemen.Aringofmusclemakessurethatthereisnochanceofurineandsemengettingmixedup.Thefe

4、malereproductivesystemThefemalereproductivesystemcontainstheseparts:ovarieseggtubesuterus(pronounced"yoo-ter-russ")cervixvagina.OvariesThetwoovariescontainhundredsofundevelopedfemalesexcellscalledeggcellsorova.Womenhavethesecellsintheirbodiesfrombirth-w

5、hereasmenproducenewspermcontinually.EggtubesEachovaryisconnectedtotheuterusbyaneggtube.ThisissometimescalledanoviductorFallopiantube.Theeggtubeislinedwithcilia,whicharetinyhairsoncells.Everymonth,aneggdevelopsandbecomesmature,andisreleasedfromanovary.Th

6、eciliawafttheeggalonginsidetheeggtubeandintotheuterus.UterusandcervixTheuterusisalsocalledthewomb.Itisamuscularbagwithasoftlining.Theuterusiswhereababydevelopsuntilitsbirth.Thecervixisaringofmuscleatthelowerendoftheuterus.Itkeepsthebabyinplacewhilethewo

7、manispregnant.VaginaThevaginaisamusculartubethatleadsfromthecervixtotheoutsideofthewoman'sbody.Aman'spenisgoesintothewoman'svaginaduringsexualintercourse.Theopeningtothevaginahasfoldsofskincalledlabiathatmeettoformavulva.Theurethraalsoopensintothevulva,

8、butitisseparatefromthevagina,andisusedforpassingurinefromthebody.ThemenstrualcycleThefemalereproductivesystemincludesacycleofeventscalledthemenstrualcycle.Itlastsabout28days,butitcanbeslightlylessormorethanthis.Thecyclestopswhile