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ReferenceandAnswersUnitOneIntegumentarySystemPartIIntroductiontotheIntegumentarySystemThinkandTalkReference:Theskinconsistsoftwolayers:theepidermisandthedermis.Beneaththedermisliesthehypodermisorsubcutaneousfattytissue.Theskinhasthreemainfunctions:protection,regulationandsensation.Theskinisastablebutflexibleoutercoveringthatactsasbarrier,protectingyourbodyfromharmfulthingsintheoutsideworldsuchasmoisture,thecoldandsunrays,aswellasgermsandtoxicsubstances.Theepidermisprotectsthebodybykeepingthingsthatmightbeharmfuloutandkeepingthethingsyourbodyneedstofunctionproperlyin.Bacteria,viruses,fungiandotherinfectiousagentsarekeptout.Sebumproducedbyglandshelpsinhibitmicrobestokeeptheskinwaterproof,sothatwaterandnutrientsarekeptinforthebodytouse.Specializedcellsintheepidermishelpprotectyourbody,too.Me