The Nervous Sy

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1、TheNervousSystemChapterFiveChapterFive5-1:TheNervousSystemNervousSystemAsystemthatcontrolsalloftheactivitiesofthebody.Thenervoussystemismadeof:ThebrainThespinalcordThenervesThesensesThenervoussystemalsoallowsyoutoreacttoastimulus.StimulusAstimulusisachangei

2、ntheenvironment.Example:AhotstoveOr…trippingoverarockYourreactionsareautomatic.AutomaticAutomaticmeansthatyoudonothavetothinkaboutyourreactions.Example:Ifabugfliesbyyoureye,youwillblink.BrainAnorganthatcontrolsyouremotions,yourthoughts,andeverymovementyouma

3、ke.CentralNervousSystemTheCentralNervousSystemismadeofthebrainandthespinalcord.TheCentralNervousSystemcontrolseverythinginthebody.OuterNervousSystemTheOuterNervousSystemismadeofthenervesandthesenseorgans.NervesSenseorgansNerveImpulseMessagescarriedthroughou

4、tthebodybynerves."FunnyBone"Youhaveanervealongyourwholearm.The“funnybone”istheonlyplaceonthearmwherethenerveisnotprotected.The“funnybone”isontheelbow.TheNervousSystem5-2TheCentralNervousSystemTheCentralNervousSystem*TheCentralNervousSystemcontrolsallofthebo

5、dy’sactivities.*TheCentralNervousSystemismadeoftwomainorgans.1.Thebrain2.ThespinalcordTheSpinalCord*Thespinalcordsendsmessagestothebrain.*Thespinalcordisthepartofthenervoussystemthatconnectsthebraintotherestofthenervoussystem.TheBrain*Thebraincontrolseveryt

6、hinginthebody.*Thebrainismadeofmorethan10billionnerves!*Thebrainisdividedintothreepartsandisprotectedbytheskull.TheThreePartsoftheBrain*TheBrainhasthreemainparts…1.TheCerebrum2.TheCerebellum3.TheBrainStemTheCerebrum*TheCerebrumisthelargestpartofthebrain.1.T

7、hecerebrumcontrolsyourthinking.2.Thecerebrumcontrolsyourmemory.3.Thecerebrumcontrolsyourspeaking.4.Thecerebrumcontrolsyourmovementandidentifiestheinformationgatheredbyyoursenseorgans.TheCerebellum*Thecerebellumisbelowandtothebackofthecerebrum.1.Thecerebellu

8、mcontrolsyoubalance.2.Thecerebellumcontrolsyourposture.TheBrainStem*TheBrainStemconnectsthebraintothespinalcord.*Thenervesinthebrainstemcontrolyourheartbeat,breathing,andbloodpressure.TheVertebrae*Thev