最新CH 3 Digestion, Absorption, and TransportCH 3消化，吸收，运输-药学医学精品资料.ppt

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1、最新CH3Digestion,Absorption,andTransportCH3消化，吸收，运输-药学医学精品资料ChapterOverviewThischaptercoverseverythingfromcellstructuretoallofthesystemsofthebody!ThisisthecontentofBIO100inonechapter!Wewillfocusonthedigestivesystemandsystemsthatdirectlyrelatetothefunctionofthissystem..SectionsCoveredWh

2、ilewemaytouchoncontentinothersections,wewillfocuson:Cardiovascular&lymphaticsystem(3.4)Endocrinesystem(3.6)Digestivesystem(3.8)BloodVesselsBloodleavesheartthroughanartery(aorta)VesselsbranchintosmallerandsmallervesselsSmallestbloodvesselisthecapillaryExchangesofgases,nutrientsandwast

3、esbetweenbodycellsandtheCVsystemoccuratthecapillarylevelCVSystem&DigestiveTractCVsystemtransportsnutrientstothecellsofthebodyWatersolublenutrientsareabsorbedintocapillariesinthesmallintestine(SI)CapillariesmergetoformtheportalveinPortalveintransportsnutrientstotheliver#7onpage90Lymph

4、aticSystemLymphvesselstransports:whitebloodcellsexcessfluidbetweencellsReturnsthefluidtothebloodfatsolublenutrientsabsorbedfromtheSILymphvesselsbranchtoformlactealsFatsolublenutrientsareabsorbedintolacteals–page91LymphaticSystemLymphvesselsleavingtheSImergewithveinsneartheheartFatsol

5、ublenutrientsinthelymphentertheblood,gothroughtheheartandlungsandarethencirculatedinthebloodEndocrineSystemEndocrineglandssecretehormonesHormonesenterthebloodandbindtotargetcellsCellswithreceptorsforthehormoneBindingtriggersachangeinthetargetcells/organSeetable3-2onpage94EndocrineSys

6、temDigestiveSystem(finally)Functions:Digestion,Absorption,EliminationDigestion–processofbreakingdownfoodstoreleasenutrientsGoalistobreaknutrientsintoabsorbableunits2typesofdigestions:MechanicalChemical(enzymatic)OverviewDigestiveSystemAbsorption–movementofnutrientsoutofGItractintoblo

7、odorlymphWatersolublenutrientsFatsolublenutrientsExcretion–eliminationofundigestedfoods(feces)OverviewDigestiveSystemStructureGastrointestinal(GI)TractContinuoustubefrommouthtoanusSeeboardandpage97GITractAnatomyDigestiveTractLayersofGItractorgansSerosa(outermost)InterfacebetweenGI

8、tractandlymp