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时间:2021-04-14
《最新Chapter 20 Digestive System:20章消化系统-药学医学精品资料.ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、最新Chapter20DigestiveSystem:20章消化系统-药学医学精品资料FunctionsofDigestionIngestfoodBreakdownfoodintosmallmolecules:Mechanicaldigestion-Chemicaldigestion–AbsorptionEliminationCarbohydratesIncludesugarsandtheirpolymersMonomeristhemonosaccharideInclude3–7carbonswiththe–OHgroupbeingpres
2、entoneachcarbonexceptone,whichisdoublebondedtoanoxygen(carbonylgroup)AlimentaryCanalHollowtubethatbeginsatthemouth,endsattheanusMouthPharynxEsophagusStomachSmallintestineLargeintestineRectumA.MouthFormsabolusChemicaldigestion–mucous,amylase(breakdowncarbs)Mechanicaldigesti
3、on:chewingRoofofmouth:HardpalateSoftpalateTongueandTasteLingualfrendulum–attachestonguetofloorofmouthTastebuds:Papillae:elevationsontongueSalivaryGlandsSaliva–watermucous,amalaseParotid–frontofandbelowears.(mumps)SublingualsubmandibularB.PharynxRegionbetweenmouthandesophag
4、us“throat”Function–swallowingEpiglottis–blockslarynxUvula–backofthroatC.EsophagusLinedbymucousmembraneandsmoothmusclePeristalsis–involuntarycontractionofesophagusHeartburn–(acidreflux)EsophagusContinuedD.StomachStoresfoodanddigestsproteinRugae–foldsinsidestomachUlcersStoma
5、chContinuedGastricJuice–producesChymePepsin–enzymethatdigestsproteinHCL–killsbacteria,breaksdownfood,Intrinsicfactor–absorptionofB12.Mucous–softensfoodGastrin–hormonethatcausesgastricjuicetobereleased.E.SmallIntestineFunction-receivessecretionsfromtheliver,pancreasandabsor
6、ptionofnutrients.LinedwithVilli–furrylooking,absorption,increasesurfaceareaF.LargeIntestineFunction–absorbwater,producefecesE.colibacteriapresentDisordersofLargeIntestineDiarrhea–Constipation–Appendicitis–Diverticuloisis–coloncancerColonoscopyPart2:DigestiveSystemAccessory
7、organs–fooddoesnotpassthrough1.PancreasSecretesSodiumBicarbonateandenzymestodigestcarbohydrates,proteins,andfats2.Liver–LargestglandStorageofglucoseasglycogenDestructionofoldredbloodcells–thiscreatesbilirubinProductionofbilePlasmaproteinsDetoxificationofbloodStorageofirona
8、ndothervitaminsLiverLobuleAnatomyFunctionalunitoftheliver.Bloodtravelsfromsmallintestine–
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