消化系统DigestiveSystem课件.ppt

DigestiveSystem

消化系统

Composition消化系统组成Digestivetract消化管Mouth口腔Pharynx咽Esophagus食管Stomach胃Smallintestine小肠Largeintestine大肠Duodenum十二指肠Jejunum空肠Ileum回肠Digestivegland消化腺：大消化腺，小消化腺Superiordigestivetube上消化道Inferiordigestivetube下消化道Majorsalivaryglands大唾液腺Liver肝Pancreas胰Function:ingestion,digestion,absorption,egesting

MouthPharynxEsophagusStomachDuodenumJejunumIleumLargeintestineLiverPancreasMajorsalivaryglands

TheEsophagus食管

Generalfeatures位置及形态amusculartuberabout25cmlong,connectingthepharynxatlevelofC6vertebra,atlevelofT11vertebraentersthestomach.Division:Cervicalpart颈部Thoracicpart胸部Abdominalpart腹部

Threeconstrictions食管3个狭窄第一狭窄：起始部Atitsbeginning,15cmfromincisors,liesatlevelofC6,isthenarrowestpartoftheesophagus第二狭窄：与左主支气管交叉处Whereitiscrossedbyleftmainbronchus,25cmfromincisors,liesatlevelofintervertebraldiscbetweenT4andT5.第三狭窄：穿膈处Whereitpassesthroughtheesophagealhiatusofdiaphragm,40cmfromincisors,atlevelofT10

TheStomach胃

Shape形态、分部Twosurface两壁:anterior前壁andposterior后壁.Twocurvatures两缘Lessercurvature胃小弯:short,concaveanddirectedtotherightandupward,Greatercurvature胃大弯:long,convexanddirectedtotheleftanddownward.Twoopenings两口Cardia贲门Pylorus幽门

Cardiacpart贲门部Fundusofstomach胃底Bodyofstomach胃体Pyloricantrum幽门窦Pyloriccanal幽门管Pyloricpart幽门部

Position胃的位置－Mainlypartsissituatedinthelefthypochondriacregion左季肋区,smallintheepigastricregion腹上区;

TheSmallIntestine小肠About5-7mlong,DividedintoDuodenum十二指肠Jejunum空肠Ileum回肠DuodenumJejunumIleum

Duodenum十二指肠FourpartsSuperiorpart上部Duodenalcap十二指肠球Superiorduodednalflexure十二指肠上曲Descendingpart降部Majorduodenalpapilla十二指肠大乳头Minorduodenalpapilla十二指肠小乳头Inferiorduodenalflexure十二指肠下曲Horizontalpart水平部Ascendingpart升部duodenojejunalflexure十二指肠空肠曲

Jejunum空肠andileum回肠

LargeIntestine大肠

Approxim