醫(yī)療英語MUSCULARSYSTEM肌肉系統(tǒng)省名師優(yōu)質(zhì)課賽課獲獎?wù)n件市賽課一等獎?wù)n件

Muscular

SystemHuangTian,APSUMC第1頁OutlineFunctionsofthemuscularsystemThreedifferenttypesofmuscletissuesStructureoftheskeletalmusclefiberSlidingfilamentmodelofmusclecontractionMuscledisorders第2頁ListanddescribefunctionsofmusclesIdentifythedifferencesamongthreetypesofmusclesDescribethestructureoftheskeletalmusclefiberDescribetheslidingfilamentmodleofmusclecontractionListanddescribemuscledisordersObjectivesBytheendofthissection,studentsshouldbeableto第3頁IntroductionThemuscularsystemisthelargestsysteminthebody.?ourbodyweightcomesfrommuscles.Consistsofover600individualmuscles.Consists3differenttypesofmuscletissues.CardiacmuscleSmoothmuscleSkeletalmuscle

第4頁―Producemovementandmaintainposture―Pumpblood―Respiration―Protectinternalorgans.―Producebodyheatandregulatebodytemperature.Functions第5頁231第6頁4576第7頁MuscleTypesThreeTypesofMusclesCardiacmuscleSmoothmuscleSkeletalmuscle第8頁CardiacMuscleStriatedandbranchedSinglenucleusthatiscentrallylocatedMembranesofadjacent鄰近

cellsfusedat熔凝intercalateddiscs閏盤

InvoluntaryOnlyfoundinheart第9頁Cardiac[?kɑ:di:??k]心臟Myocardium[?mai?u?kɑ:di?m]心肌第10頁Striation[strai?ei??n]條紋Intercalateddisk[in?t?:k?leitid][disk]閏盤第11頁CardiacMuscle第12頁SmoothMuscleNon-striatedSpindle-shapedcellsSinglenucleusthatiscentrallylocatedInvoluntaryFoundmainlyinthewallsofholloworgans第13頁SmoothMuscle括約肌第14頁十二指腸（小腸）幽門瓣膜第15頁StriatedMultinucleatecellsthatareperipherallylocatedVoluntaryAttachedtoboneofskeletonSkeletalMuscle第16頁SkeletalMuscle

Striation第17頁第18頁第19頁第20頁第21頁第22頁StructureofSkeletalMuscle

Fascia肌纖維膜微線第23頁Fascia[?f??i:?]筋膜Fascicle[?f?sikl]肌束

Myofibril[?mai?u?faibril]肌原纖維第24頁SkeletalMuscle

3layersofconnectivetissue

EpimysiumPerimysiumEndomysium第25頁Epimysium[?epi?mizi?m]肌外膜Perimysium[?peri?mizi?m]肌束膜Endomysium[?end?u?mizi?m]肌內(nèi)膜第26頁SkeletalMuscleFiberCells–multinucleateNuclei–justbeneaththesarcolemmaSarcolemma–specializedplasmamembraneSarcoplasm–cytoplasmofmusclecells第27頁Sarcolemma[?sɑ:k??lem?]肌纖維膜Sarcoplasm[?sɑ:k??pl?z?m]肌質(zhì)第28頁DistinctbandsIband= lightbandAband=

darkbandMyofibril肌動蛋白肌漿球蛋白第29頁ContractileunitofamusclefiberSarcomere肌節(jié)Zdisk–adarkerareainmiddleofIband–extendfromZdisktoZdisk肌小節(jié)第30頁Sarcomere[?sɑ:k?mi?]肌節(jié)Myofilament[?mai?u?fil?m?nt]肌絲第31頁SarcomereIband–distancebetweentwothickfilaments–containsonlythinfilamentsAband

–lengthofthickfilament–overlapwiththinfilamentsHzone

–atcenterofAband–containsonlythickfilamentsMline-middleoftheHzone第32頁ActinfilamentsMyosinfilamentsMyofilaments第33頁Actin[??ktin]

肌動蛋白Myosin[?mai?usin]肌球蛋白第34頁LevelsofFunctionalOrganizationinaSkeletalMuscleFiber第35頁

MyosinheadsattachtoactinmoleculesMyosin“pulls”onactin,causingthinmyofilamentstoslideacrossthickmyofilaments,towardsthecenterofthesarcomereSlidingFilamentModelofContraction第36頁Duringacontraction,theAbandstaysthesamewidth,buttheZlinesmoveclosertogetherandtheIbandandHzonearereducedinwidth.SlidingFilamentModelofContraction第37頁SarcomereShortening第38頁CircletheletterofthechoicethatliststhemusclestructuresfromlargesttosmallestMyofibrils,filaments,musclefibersMusclefibers,Myofibrils,filamentsMusclefibers,filaments,MyofibrilsMyofibrils,musclefibers,filaments第39頁IbandAbandAIIbandAbandAI第40頁MuscledisordersFatigueStrainCrampMyastheniagravisMusculardystrophy第41頁MuscleFatigueDothis:Sitagainstthewallwithyourkneesbentata900angle.Holdthispositionforaslongasittakestofeelmusclefatigue.Tirednessfollowingprolongedorintenseactivity第42頁StrainInjuriesduetoover-stretchedmusclesortendonsSymptoms–Swelling腫脹–Pain–Bruising挫傷第43頁CrampPainfulinvoluntarycontractionofaskeletalmuscleormusclegroupresultfrom

alackofsaltorotherminerals(likecalciumandpotassium),musclefatigue,ordehydration.脫水

第44頁Strain[strein]拉傷Cramp[kr?mp]痙攣第45頁Myastheniagravis

AntibodiesattackAch乙酰膽堿

receptorsProgressiveweaknessandparalysis麻痹

第46頁Myastheniagravis[?mai?s?θi:ni?][?gr?v?s]重癥肌無力Acetylcholine[??si:t?l?k?ulin]乙酰膽堿第47頁MusculardystrophyDuetoadefectiveproteinProgressivemuscleweaknessandparalysis麻痹癱瘓第48頁Musculardystrophy[?m?skjul??distr?fi]肌肉萎縮癥Dystrophin[dis'tr?fin]抗肌萎縮蛋白第49頁cardiacmusclesmoothmuscleskeletalmuscleinvoluntarymusclevoluntarymusclemusclefiber

sarc