AGlanceatHumanBody(easyversion)人體結構一瞥(兒童版)服從真理，就能征服一切事物AGlanceatHumanBody(easyversion)人體結構一瞥(兒童版)AGlanceatHumanBody(easyversion)人體結構一瞥(兒童版)服從真理，就能征服一切事物AGlanceatHumanBodyJESSE’SHOMEPROJECT2012.12.05.BasicstructuresMajorsystemsofbodySkeletalSystemSkeletalsystemisthesystemofbones,associatedcartilagesandjointsBone

isatoughandrigidformofconnectivetissue.ItistheweightbearingorganofhumanbodyanditisresponsibleforalmostallstrengthofhumanskeletonCartilageisalsoaformofconnectivetissuebutisnotastoughandrigidasbone.Joints

makethehardandrigidskeletonallowdifferenttypesofmovementsatdifferentlocations.

SkeletalSystemThemainroleoftheskeletalsystemistoprovidesupportforthebody,toprotectdelicateinternalorgansandtoprovideattachmentsitesfortheorgans.

MuscularSystemMuscularSystemMusclesarebodytissuesthatprovidetheforceforallbodymovements.Theyaremadeofspecialtypesofcells.SkeletalMuscles:theyarealmostalwaysfoundattachedtotheskeletonandproducemovementsindifferentpartsoftheskeleton.TheyareunderthecontrolofhumanwillSmoothMuscles:formthesoftbodyorganslikestomach,intestine,bloodvesselsetc.Theyarenotunderthewillofhumanbeingsandareresponsibleforunconsciousbodyactivitieslikedigestionoffood.CardiacMuscles:Theyareonlyfoundinhumanheart,extremelystrongandpowerfulmuscles.Theyarenotunderthecontrolofhumanwillandareinvoluntary.ThreetypesofmusclesSkeletalMusclesSmoothMuscles:CardiacMusclesMuscularSystemThemainroleofthemuscularsystemistoprovidemovement.Musclesworkinpairstomovelimbsandprovidetheorganismwithmobility.Musclesalsocontrolthemovementofmaterialsthroughsomeorgans,suchasthestomachandintestine,andtheheartandcirculatorysystem.NervousSystemNeuronistheunitofnervoussystemCENTRALNERVOUSSYSTEM(CNS):includesbrainandspinalcord.

PERIPHERALNERVOUSSYSTEM(PNS):includesallthepartsofnervoussystemexceptbrainandspinalcord.Itisfurtherdividedintotwocomponents;SomaticnervoussystemandAutonomicnervoussystem.NervoussystemNervoussystemThemainroleofthenervoussystemistorelayelectricalsignalsthroughthebody.Thenervoussystemdirectsbehaviorandmovementand,alongwiththeendocrinesystem,controlsphysiologicalprocessessuchasdigestion,circulation,etc.RespiratorySystemKEYSTRUCTURES:lungsbronchibronchiolesalveoliRespiratorySystemRespiratorySystemRespiratorySystemThemainroleoftherespiratorysystemistoprovidegasexchangebetweenthebloodandtheenvironment.Primarily,oxygenisabsorbedfromtheatmosphereintothebodyandcarbondioxideisexpelledfromthebody.CardiovascularSystemMajorOrgans:

HeartHeartismadeupofthreelayers;Pericardium,MyocardiumandEndocardium.bloodvesselsthreetypesofbloodvesselsArteries,CapillariesandVeins.Bloodtwomajorportions:BloodcellsandPlasmaHeartCirculationSystemCellsinthebloodCardiovascularSystemThemainroleofthecirculatorysystemistotransportnutrients,gases(suchasoxygenandCO2),hormonesandwastesthroughthebody.DigestiveSystemMajorOrgans:

MouthEsophagusStomachsmallandlargeintestines.DigestiveSystemDigestiveSystemThemainroleofthedigestivesystemistobreakdownandabsorbnutrientsthatarenecessaryforgrowthandmaintenance.EndocrineSystemEndocrineSystemTypesofEndocrineGlands1)TYPICALENDOCRINEGLANDS:Theseglandshaveprimaryfunctionofproducinghormonesforhumanbody.Theyinclude;PITUITARYGLANDTHYROIDGLANDPARATHYROIDGLANDSADRENALGLANDS2)ORGANSHAVINGSECONDARYENDOCRINEFUNCTION:Theseorgansprimarilybelongtosomeothersystemofthebodybuthaveasecondaryfunctionofproducinghormones.Theyinclude;PANCREAS(HormonesofPancreas)OVARIES(Infemales)(HormonesofOvaries)TESTES(Inmales)(HormonesofTestes)KIDNEYS(HormonesofKidneys)LIVER(HormonesofLiver)EndocrineSystemThemainroleoftheendocrinesystemistorelaychemicalmessagesthroughthebody.Inconjunctionwiththenervoussystem,thesechemicalmessageshelpcontrolphysiologicalprocessessuchasnutrientabsorption,growth,etc.LymphaticSystemKEYSTRUCTURES:lymphnodesLymphVesselswhitebloodcells,T-andB-cells.LymphaticSystemLymphaticSystemThemainroleoftheimmunesystemistodestroyandremoveinvadingmicrobesandvirusesfromthebody.Thelymphaticsystemalsoremovesfatandexcessfluidsfromtheblood.UrinarySystemMajorOrgans:

KidneysUretersbladderurethraUrinarySystemUrinarySystemThemainroleoftheurinarysystemistofilteroutcellularwastes,toxinsandexcesswaterornutrientsfromthecirculatorysystem.SkinSystemTheskinsystemistheorgansystemthatprotectshumanbodyfromdamage.Itconsistsofskinanditsappendages,whichincludehair,nails,andsweatglandsetc.Itformsabout16percentoftheweightofhumanbody.SkinSystemSkinSystemItservesasawaterproofcushionthatprotectsdeepertissues.ItgetsridofwastesandregulatesbodytemperatureIthavemanytypesofsensoryreceptorstodetectpain,sensation,pressure,andtempe