ContentsPartIIntroductiontotheDigestiveSystemPartIIDiseasesRelatedtotheDigestiveSystemPartIIICelebrityandDiseasePartIVMedicalTerminologyRelatedtotheDigestiveSystem1PartVFurtherThinking
PartIVideo:IntroductiontotheDigestiveSystem2
ThinkandTalkInthedigestivesystem,ingestedfoodisconvertedintoaformthatcanbeabsorbedintothecirculatorysystemfordistributiontoandutilizationbythevarioustissuesofthebody.Thisisaccomplishedbothphysically,bymasticationinthemouthandchurningofthestomach,andchemically,bysecretionsandenzymesofthegastrointestinaltract.Beginningatthemouth,allfoodpassesthroughthealimentarycanalwhichincludespharynx,esophagus,stomach,andintestinesbeforeitreachestheanus,whereundigestedmatteriseliminatedaswaste.Theouterwallsofthedigestivetractarecomposedoflayersofmuscleandtissuethatundergowavesofcontraction,i.e.peristalsis,therebypushingthefoodalongitsdigestivepath.Theinnerliningcontainsglandsthatsecretetheacidsandenzymesnecessarytobreakdownfoodintoaformutilizablebythebody.Reference3
TaskOne:TrueorFalseT (2)F(3)T (4)F(5)T WatchandDo4
TaskTwo:BlankFilling1.Salivaisreleasedintothemouthtobegindissolvingthefoodandtomakeitslipperysothatitcanpasseasilythroughthethroatandesophagus.2.Astronautsinspacecandigestfoodeveninweightlessconditionswherethereisn’tanygravitybecauseofthemuscularcontractionsofperistalsis.WatchandDo5
TaskTwo:BlankFilling3.Afteraboutthreetosixhours,thefoodcontinuestomovealongthroughthedigestivetractandfromthestomachentersthesmallintestine.4.Imaginethisgardenhosewhichissevenmeterslong,allcurledupandfoldedarounditselfinsideahumanbeing.5.Theliverislocatedtotherightofthestomach,oneofitsimportantjobsistoproducebile,asubst