NTRODUCTION

Organismscreatedescendants.

Organismsperpetuatethemselves.

Differentiatelivingthingsfromnonlivingthings.

Continuationofspecies.

Reproduction?

Inhumansexualreproductionmale,reproductiveorgansorgenitals,arebothinsideandoutside

thepelvis.

Infemale,reproductiveorgansareentirelywithinthepelvis.Amaleandafemaleofthesamespeciesarerequiredtocopulateand

surviveintheconstantlychangingenvironment.

geneticallydifferentfromhisparents.

Itreliesonmeiosistoshufflethegenes,sothatnewcombinationsof

Themalereproductivesystemproduces,sustains,anddeliverssperm

Italsosupportsthedevelopmentofanoffspring(gestation)andgives

cells(spermatozoa)tothefemalereproductivetract.

genesoccurineachgeneration,allowingsomeoftheoffspringto

cells(oocytes)tobefertilizedbysperm.

combinetheirgenesinordertoproduceanewindividualwhois

Thefemalereproductivesystemproduces,sustains,andallowsegg

birthtoanewindividual(parturition).MALE REPRODUCTIVE ORGAN

Accessory sex organs (ducts and glands)

Primary sex organs (testes)

Male reproductive organs include:

Ducts -epididymis, ductus deferens, ejaculatory duct and urethra.

Glands -seminal vesicles, prostate gland, and bulbourethral glaTESTES(singular,testis)

Eachtestiscontainsabout250functionalunitscalledlobules;each

occurs.

Developedinamalefetusnearthekidneys,anddescendintothe

tunicaalbuginea.

Sexorganthatproducessperminaprocesscalledspermatogenesis,

scrotumabout2monthsbeforebirth.

Allseminiferoustubulesinatestisconvergeandformachannel

lobulecontainsabout4seminiferoustubuleswherespermatogenesis

andmalesexhormones(testosterone).

Eachtestisisenclosedbyalayeroffibrousconnectivetissuecalled

calledretetestis.