100 VERY COOL FACTS ABOUT THE HUMAN BODY - e ...

100 VERY COOL FACTS ABOUT THE HUMAN BODY · Sneezes regularly exceed 100 mph. · Coughs clock in at about 60 mph. · Women blink twice as many times as men do. · A ... e-Ítaca Centro [Centro] Sobrenosotros Quéesloquehacemosyquienessomos...Documentacióndecentro Localizaciónycontacto DóndeestamosycómollegaralÍtaca Secretaría Informacióngeneral,matrícula,TPVeimpresos OfertaEducativa Todaslasenseñanzasqueimpartimos Departamentos Todaslasáreasdeconocimiento.Programaciones Orientación Atenciónpersonalizadaalalumnado Tutorías ListadodeTutoresyhorariodeatención Extraescolares Actividadeslúdicasparaaprendermás Calidad EstándarISO9001 Biblioteca Másqueunasaladeestudio Comunidad [Comunidad] Profesores Herramientasydocumentaciónútilesparalosprofes AsociacióndeAlumnos Seorganizanparamejorarlascosas PIEE ProyectodeIntegracióndeEspaciosEscolares AMPA AsociacióndeMadresyPadresSaracosta ConsejoEscolar Participacióndelacomunidadeducativaenelinsti CoroÍtaca Quiencantasumalespanta... Bancodelibros Paracompartirlibrosymaterialescurriculares ConvivenciaeIgualdad Aprenderarespetaryateneractitudespositivas Proyectos [Proyectos] Bilingüismo AICLE,CLIL,PIBLEA...Unpocodehistoria.Accesoablogs DeporteExtraescolarÍtaca DeportesyCompeticionesdenuestroCentro EscuelaPromotoradeSalud NuestroIESpertenecealaredRAEPS Erasmus+ Enriqueciendovidas,abriendomentes ViajedeEstudios4ºESO CulminacióndelaetapadeSecundaria RumboaÍtaca 1erProyectodeCentro InnovaciónyFormación Conocimientoaplicadoyemocional PasaporteCultural ParticipaysumaHuellasÍtaca DesarrollodeCapacidades Contenidosconmetodologíasinnovadoras Viverodeempresas Unaestructuraparamicroempresas Noticias Avisos! Thehumanbodyisanincrediblycomplexandintricatesystem,onethatstillbafflesdoctorsandresearchersonaregularbasisdespitethousandsofyearsofmedicalknowledge. Asaresult,itshouldn’tbeanysurprisethatevenbodypartsandfunctionswedealwitheverydayhavebizarreorunexpectedfactsandexplanationsbehindthem.Fromsneezestofingernailgrowth,hereare100weird,wacky,andinterestingfactsaboutthehumanbody. TheBrain Thehumanbrainisthemostcomplexandleastunderstoodpartofthehumananatomy.Theremaybealotwedon’tknow,buthereareafewinterestingfactsthatwe’vegotcovered. Nerveimpulsestoandfromthebraintravelasfastas170milesperhour.Everwonderhowyoucanreactsofasttothingsaroundyouorwhythatstubbedtoehurtsrightaway?It’sduetothesuper-speedymovementofnerveimpulsesfromyourbraintotherestofyourbodyandviceversa,bringingreactionsatthespeedofahighpoweredluxurysportscar. Thebrainoperatesonthesameamountofpoweras10-wattlightbulb.Thecartoonimageofalightbulboveryourheadwhenagreatthoughtoccursisn’ttoofaroffthemark.Yourbraingeneratesasmuchenergyasasmalllightbulbevenwhenyou’resleeping. Thehumanbraincellcanhold5timesasmuchinformationastheEncyclopediaBritannica.Oranyotherencyclopediaforthatmatter.Scientistshaveyettosettleonadefinitiveamount,butthestoragecapacityofthebraininelectronictermsisthoughttobebetween3oreven1,000terabytes.TheNationalArchivesofBritain,containingover900yearsofhistory,onlytakesup70terabytes,makingyourbrain’smemorypowerprettydarnimpressive. Yourbrainuses20%oftheoxygenthatentersyourbloodstream.Thebrainonlymakesupabout2%ofourbodymass,yetconsumesmoreoxygenthananyotherorganinthebody,makingitextremelysusceptibletodamagerelatedtooxygendeprivation.Sobreathedeeptokeepyourbrainhappyandswimminginoxygenatedcells. Thebrainismuchmoreactiveatnightthanduringtheday.Logically,youwouldthinkthatallthemovingaround,complicatedcalculationsandtasksandgeneralinteractionwedoonadailybasisduringourworkinghourswouldtakealotmorebrainpowerthan,say,lyinginbed.Turnsout,theoppositeistrue.Whenyouturnoffyourbrainturnson.Scientistsdon’tyetknowwhythisisbutyoucanthankthehardworkofyourbrainwhileyousleepforallthosepleasantdreams. ScientistssaythehigheryourI.Q.themoreyoudream.Whilethismaybetrue,don’ttakeitasasignyou’rementallylackingifyoucan’trecallyourdreams.Mostofusdon’tremembermanyofourdreamsandtheaveragelengthofmostdreamsisonly2-3seconds–barelylongenoughtoregister. Neuronscontinuetogrowthroughouthumanlife.Foryearsscientistsanddoctorsthoughtthatbrainandneuraltissuecouldn’tgroworregenerate.Whileitdoesn’tactinthesamemannerastissuesinmanyotherpartsofthebody,neuronscananddogrowthroughoutyourlife,addingawholenewdimensiontothestudyofthebrainandtheillnessesthataffectit. Informationtravelsatdifferentspeedswithindifferenttypesofneurons.Notallneuronsarethesame.Thereareafewdifferenttypeswithinthebodyandtransmissionalongthesedifferentkindscanbeasslowas0.5meters/secorasfastas120meters/sec. Thebrainitselfcannotfeelpain.Whilethebrainmightbethepaincenterwhenyoucutyourfingerorburnyourself,thebrainitselfdoesnothavepainreceptorsandcannotfeelpain.Thatdoesn’tmeanyourheadcan’thurt.Thebrainissurroundedbyloadsoftissues,nervesandbloodvesselsthatareplentyreceptivetopainandcangiveyouapoundingheadache. 80%ofthebrainiswater.Yourbrainisn’tthefirm,graymassyou’veseenonTV.Livingbraintissueisasquishy,pinkandjelly-likeorganthankstotheloadsofbloodandhighwatercontentofthetissue.Sothenexttimeyou’refeelingdehydratedgetadrinktokeepyourbrainhydrated. HairandNails Whilethey’renotalivingpartofyourbody,mostpeoplespendagoodamountoftimecaringfortheirhairandnails.Thenexttimeyou’reheadinginforahaircutormanicure,thinkofthesefacts. Facialhairgrowsfasterthananyotherhaironthebody.Ifyou’veeverhadacoveringofstubbleonyourfaceasyou’reclockingoutat5o’clockyou’reprobablyprettyfamiliarwiththis.Infact,iftheaveragemannevershavedhisbearditwouldgrowtoover30feetduringhislifetime,longerthanakillerwhale. Everydaytheaveragepersonloses60-100strandsofhair.Unlessyou’realreadybald,chancesaregoodthatyou’resheddingprettyheavilyonadailybasis.Yourhairlosswillvaryinaccordancewiththeseason,pregnancy,illness,dietandage. Women’shairisabouthalfthediameterofmen’shair.Whileitmightsoundstrange,itshouldn’tcomeastoomuchofasurprisethatmen’shairshouldbecoarserthanthatofwomen.Hairdiameteralsovariesonaveragebetweenraces,makinghairplugsonsomemenlookespeciallyobvious. Onehumanhaircansupport3.5ounces.That’sabouttheweightoftwofullsizecandybars,andwithhundredsofthousandsofhairsonthehumanhead,makesthetaleofRapunzelmuchmoreplausible. Thefastestgrowingnailisonthemiddlefinger.Andthenailonthemiddlefingerofyourdominanthandwillgrowthefastestofall.Whyisnotentirelyknown,butnailgrowthisrelatedtothelengthofthefinger,withthelongestfingersgrowingnailsthefastestandshortesttheslowest. Thereareasmanyhairspersquareinchonyourbodyasachimpanzee.Humansarenotquitethenakedapesthatwe’remadeouttobe.Wehavelotsofhair,butonmostofusit’snotobviousasamajorityofthehairsaretoofineorlighttobeseen. Blondeshavemorehair.They’resaidtohavemorefun,andtheydefinitelyhavemorehair.Haircolordetermineshowdensethehaironyourheadis.Theaveragehumanhas100,000hairfollicles,eachofwhichiscapableofproducing20individualhairsduringaperson’slifetime.Blondesaverage146,000follicleswhilepeoplewithblackhairtendtohaveabout110,000follicles.Thosewithbrownhairfittheaveragewith100,000folliclesandredheadshavetheleastdensehair,withabout86,000follicles. Fingernailsgrownearly4timesfasterthantoenails.Ifyounoticethatyou’retrimmingyourfingernailsmuchmorefrequentlythanyourtoenailsyou’renotjustimaginingit.Thenailsthatgetthemostexposureandareusedmostfrequentlygrowthefastest.Onaverage,nailsonboththetoesandfingersgrowaboutone-tenthofanincheachmonth. Thelifespanofahumanhairis3to7yearsonaverage.Whileyouquiteafewhairseachday,yourhairsactuallyhaveaprettylonglifeprovidingtheyaren’tsubjecttoanytrauma.Yourhairswilllikelygettoseeseveraldifferenthaircuts,styles,andevenpossiblydecadesbeforetheyfalloutontheirown. Youmustloseover50%ofyourscalphairsbeforeitisapparenttoanyone.Youlosehundredsofhairsadaybutyou’llhavetolosealotmorebeforeyouoranyoneelsewillnotice.Halfofthehairsonyourprettylittleheadwillhavetodisappearbeforeyourimpendingbaldnesswillbecomeobvioustoallthosearoundyou. Humanhairisvirtuallyindestructible.Asidefromit’sflammability,humanhairdecaysatsuchaslowratethatitispracticallynon-disintegrative.Ifyou’veeverwonderedhowyourhowclogsupyourpipessoquickconsiderthis:haircannotbedestroyedbycold,changeofclimate,water,orothernaturalforcesanditisresistanttomanykindsofacidsandcorrosivechemicals. InternalOrgans Thoughwemaynotgivethemmuchthoughtunlessthey’rebotheringus,ourinternalorgansarewhatallowustogooneating,breathingandwalkingaround.Herearesomethingstoconsiderthenexttimeyouhearyourstomachgrowl. Thelargestinternalorganisthesmallintestine.Despitebeingcalledthesmallerofthetwointestines,yoursmallintestineisactuallyfourtimesaslongastheaverageadultistall.Ifitweren’tloopedbackandforthuponitselfitwouldn’tfitinsidetheabdominalcavity. Thehumanheartcreatesenoughpressuretosquirtblood30feet.Nowonderyoucanfeelyourheartbeatsoeasily.Pumpingbloodthroughyourbodyquicklyandefficientlytakesquiteabitofpressureresultinginthestrongcontractionsoftheheartandthethickwallsoftheventricleswhichpushbloodtothebody. Theacidinyourstomachisstrongenoughtodissolverazorblades.Whileyoucertainlyshouldn’ttestthefortitudeofyourstomachbyeatingarazorbladeoranyothermetalobjectforthatmatter,theacidsthatdigestthefoodyoueataren’ttobetakenlightly.Hydrochloricacid,thetypefoundinyourstomach,isnotonlygoodatdissolvingthepizzayouhadfordinnerbutcanalsoeatthroughmanytypesofmetal. Thehumanbodyisestimatedtohave60,000milesofbloodvessels.Toputthatinperspective,thedistancearoundtheearthisabout25,000miles,makingthedistanceyourbloodvesselscouldtraveliflaidendtoendmorethantwotimesaroundtheearth. Yougetanewstomachliningeverythreetofourdays.Themucus-likecellsliningthewallsofthestomachwouldsoondissolveduetothestrongdigestiveacidsinyourstomachiftheyweren’tconstantlyreplaced.Thosewithulcersknowhowpainfulitcanbewhenstomachacidtakesitstollontheliningofyourstomach. Thesurfaceareaofahumanlungisequaltoatenniscourt.Inordertomoreefficientlyoxygenatetheblood,thelungsarefilledwiththousandsofbranchingbronchiandtiny,grape-likealveoli.Thesearefilledwithmicroscopiccapillarieswhichoxygenandcarbondioxide.Thelargeamountofsurfaceareamakesiteasierforthisexchangetotakeplace,andmakessureyoustayproperlyoxygenatedatalltimes. Women’sheartsbeatfasterthanmen’s.Themainreasonforthisissimplythatonaveragewomentendtobesmallerthanmenandhavelessmasstopumpbloodto.Butwomen’sandmen’sheartscanactuallyactquitedifferently,especiallywhenexperiencingtraumalikeaheartattack,andmanytreatmentsthatworkformenmustbeadjustedorchangedentirelytoworkforwomen. Scientistshavecountedover500differentliverfunctions.Youmaynotthinkmuchaboutyourliverexceptafteralongnightofdrinking,buttheliverisoneofthebody’shardestworking,largestandbusiestorgans.Someofthefunctionsyourliverperformsare:productionofbile,decompositionofredbloodcells,plasmaproteinsynthesis,anddetoxification. Theaortaisnearlythediameterofagardenhose.Theaverageadultheartisaboutthesizeoftwofists,makingthesizeoftheaortaquiteimpressive.Thearteryneedstobesolargeasitisthemainsupplierofrich,oxygenatedbloodtotherestofthebody. Yourleftlungissmallerthanyourrightlungtomakeroomforyourheart.Formostpeople,iftheywereaskedtodrawapictureofwhatthelungslookliketheywoulddrawbothlookingroughlythesamesize.Whilethelungsarefairlysimilarinsize,thehumanheart,thoughlocatedfairlycentrally,istiltedslightlytotheleftmakingittakeupmoreroomonthatsideofthebodyandcrowdingoutthatpoorleftlung. Youcouldremovealargepartofyourinternalorgansandsurvive.Thehumanbodymayappearfragilebutit’spossibletosurviveevenwiththeremovalofthestomach,thespleen,75percentoftheliver,80percentoftheintestines,onekidney,onelung,andvirtuallyeveryorganfromthepelvicandgroinarea.Youmightnotfeeltoogreat,butthemissingorganswouldn’tkillyou. Theadrenalglandschangesizethroughoutlife.Theadrenalglands,lyingrightabovethekidneys,areresponsibleforreleasingstresshormoneslikecortisolandadrenaline.Intheseventhmonthofafetus’development,theglandsareroughlythesamesizeasthekidneys.Atbirth,theglandshaveshrunkslightlyandwillcontinuetodosothroughoutlife.Infact,bythetimeapersonreachesoldage,theglandsaresosmalltheycanhardlybeseen. BodilyFunctions Wemaynotalwaysliketotalkaboutthem,buteveryonehastodealwithbodilyfunctionsonadailybasis.Theseareafewfactsabouttheinvoluntaryandsometimesunpleasantactionsofourbodies. Sneezesregularlyexceed100mph.There’sagoodreasonwhyyoucan’tkeepyoureyesopenwhenyousneeze–thatsneezeisrocketingoutofyourbodyatcloseto100mph.Thisis,ofcourse,agoodreasontocoveryourmouthwhenyousneeze. Coughsclockinatabout60mph.Virusesandcoldsgetspreadaroundtheofficeandtheclassroomquicklyduringcoldandfluseason.With60mphcoughssprayinggermsfarandwide,it’snowonder. Womenblinktwiceasmanytimesasmendo.That’salotofblinkingeveryday.Theaverageperson,manorwoman,blinksabout13timesaminute. Afullbladderisroughlythesizeofasoftball.Nowonderyouhavetoruntobathroomwhenyoufeelthecallofthewild.Theaveragebladderholdsabout400-800ccoffluidbutmostpeoplewillfeeltheurgetogolongbeforethatat250to300cc. Approximately75%ofhumanwasteismadeofwater.Whilewemighttypicallythinkthaturineistheliquidpartofhumanwasteproducts,thetruthisthatwhatweconsidersolidwasteisactuallymostlywateraswell.Youshouldbethankfulthatmostwasteisfairlywater-filled,asdrierharderstoolsarewhatcauseconstipationandaremuchharderandsometimespainfultopass. Feethave500,000sweatglandsandcanproducemorethanapintofsweataday.Withthatkindofsweat-producingpowerit’snowonderthatyourgymshoeshaveastenchthatcanpeelpaint.Additionally,menusuallyhavemuchmoreactivesweatglandsthanwomen. Duringyourlifetime,youwillproduceenoughsalivatofilltwoswimmingpools.Salivaplaysanimportantpartinbeginningthedigestiveprocessandkeepingthemouthlubricated,andyourmouthproducesquiteabitofitonadailybasis. Theaveragepersonexpelsflatulence14timeseachday.Evenifyou’dliketothinkyou’retoodignifiedtopassgas,therealityisthatalmosteveryonewillatleastafewtimesaday.Digestioncausesthebodytoreleasegaseswhichcanbepainfuliftrappedintheabdomenandnotreleased. Earwaxproductionisnecessaryforgoodearhealth.Whilemanypeoplefindearwaxtobedisgusting,it’sactuallyaveryimportantpartofyourear’sdefensesystem.Itprotectsthedelicateinnerearfrombacteria,fungus,dirtandeveninsects.Italsocleansandlubricatestheearcanal. SexandReproduction Astabooasitmaybeinsomeplaces,sexisanimportantpartofhumanlifeasafacetofrelationshipsandthemeanstoreproduce.Hereareafewthingsyoumightnothaveknown. Onanygivenday,sexualintercoursetakesplace120milliontimesonearth.Humansareaquicklyproliferatingspecies,andwithabout4%oftheworld’spopulationhavingsexonanygivenday,it’snowonderthatbirthratescontinuetoincreaseinmanyplacesallovertheworld. Thelargestcellinthehumanbodyisthefemaleeggandthesmallestisthemalesperm.Whileyoucan’tseeskincellsormusclecells,theovumistypicallylargeenoughtobeseenwiththenakedeyewithadiameterofaboutamillimeter.Thespermcell,ontheotherhand,istiny,consistingoflittlemorethannucleus. Thethreethingspregnantwomendreammostofduringtheirfirsttrimesterarefrogs,wormsandpottedplants.Pregnancyhormonescancausemoodswings,cravingsandmanyotherunexpectedchanges.Oddlyenough,hormonescanoftenaffectthetypesofdreamswomenhaveandtheirvividness.Themostcommonarethesethreetypes,butmanywomenalsodreamofwater,givingbirthorevenhaveviolentorsexuallychargeddreams. Yourteethstartgrowing6monthsbeforeyouareborn.Whilefewbabiesarebornwithteethinplace,theteeththatwilleventuallypushthroughthegumsofyoungchildrenareformedlongbeforethechildevenleavesthewomb.At9to12weeksthefetusstartstoformtheteethbudsthatwillturnintobabyteeth. Babiesarealwaysbornwithblueeyes.Thecolorofyoureyesdependsonthegenesyougetfromyourparents,butatbirthmostbabiesappeartohaveblueeyes.Thereasonbehindthisisthepigmentmelanin.Themelanininanewborn’seyesoftenneedstimeafterbirthtobefullydepositedortobedarkenedbyexposuretoultravioletlight,laterrevealingthebaby’strueeyecolor. Babiesare,poundforpound,strongerthananox.Whileababycertainlycouldn’tpullacoveredwagonatitspresentsize,ifthechildwerethesizeofanoxenitjustmightverywellbeableto.Babieshaveespeciallystrongandpowerfullegsforsuchtinycreatures,sowatchoutforthosekicks. Oneoutofevery2,000newborninfantshasatoothwhentheyareborn.Nursingmothersmaycringeatthisfact.Sometimesthetoothisaregularbabytooththathasalreadyeruptedandsometimesitisanextratooththatwillfalloutbeforetheothersetofchopperscomesin. Afetusacquiresfingerprintsattheageofthreemonths.Whenonlyasmallfractionofthewaythroughitsdevelopment,afetuswillhavealreadydevelopedoneofthemostuniquehumantraits:fingerprints.Atonly6-13weeksofdevelopment,thewhorlsofwhatwillbefingerprintshavealreadydeveloped.Oddlyenough,thosefingerprintswillnotchangethroughouttheperson’slifeandwillbeoneofthelastthingstodisappearafterdeath. Everyhumanspentabouthalfanhourasasinglecell.Alllifehastobeginsomewhere,andeventhelargesthumansspentashortpartoftheirlivesasasinglecelledorganismwhenspermandeggcellsfirstcombine.Shortlyafterward,thecellsbeginrapidlydividingandbeginformingthecomponentsofatinyembryo. Mostmenhaveerectionseveryhourtohourandahalfduringsleep.Mostpeople’sbodiesandmindsaremuchmoreactivewhenthey’resleepingthantheythink.Thecombinationofbloodcirculationandtestosteroneproductioncancauseerectionsduringsleepandthey’reoftenanormalandnecessarypartofREMsleep. Senses Theprimarymeansbywhichweinteractwiththeworldaroundusisthroughoursenses.Herearesomeinterestingfactsaboutthesefivesensoryabilities. Aftereatingtoomuch,yourhearingislesssharp.Ifyou’reheadingtoaconcertoramusicalafterabigmealyoumaybedoingyourselfadisservice.Tryeatingasmallermealifyouneedtokeepyourhearingpitchperfect. Aboutonethirdofthehumanracehas20-20vision.Glassesandcontactwearersarehardlyaloneinaworldwheretwothirdsofthepopulationhavelessthanperfectvision.Theamountofpeoplewithperfectvisiondecreasesfurtherastheyage. Ifsalivacannotdissolvesomething,youcannottasteit.Inorderforfoods,oranythingelse,tohaveataste,chemicalsfromthesubstancemustbedissolvedbysaliva.Ifyoudon’tbelieveit,trydryingoffyourtonguebeforetastingsomething. Womenarebornbettersmellersthanmenandremainbettersmellersoverlife.Studieshaveshownthatwomenaremoreabletocorrectlypinpointjustwhatasmellis.Womenwerebetterabletoidentifycitrus,vanilla,cinnamonandcoffeesmells.Whilewomenareoverallbettersmellers,thereisanunfortunate2%ofthepopulationwithnosenseofsmellatall. Yournosecanremember50,000differentscents.Whileabloodhound’snosemaybeamilliontimesmoresensitivethanahuman’s,thatdoesn’tmeanthatthehumansenseofsmellisuseless.Humanscanidentifyawidevarietyofscentsandmanyarestronglytiedtomemories. Evensmallnoisescausethepupilsoftheeyestodilate.Itisbelievedthatthisiswhysurgeons,watchmakersandotherswhoperformdelicatemanualoperationsaresobotheredbyuninvitednoise.Thesoundcausestheirpupilstochangefocusandblurtheirvision,makingithardertodotheirjobwell. Everyonehasauniquesmell,exceptforidenticaltwins.Newbornsareabletorecognizethesmelloftheirmothersandmanyofuscanpinpointthesmellofoursignificantothersandthosewearecloseto.Partofthatsmellisdeterminedbygenetics,butit’salsolargelydotoenvironment,dietandpersonalhygieneproductsthatcreateauniquechemistryforeachperson. AgingandDeath Fromtheveryyoungtotheveryold,agingisanecessaryandunavoidablepartoflife.Learnabouttheprocesswiththeseinteresting,ifsomewhatstrangefacts. Theashesofacrematedpersonaverageabout9pounds.Abigpartofwhatgivesthehumanbodyweightisthewatertrappedinourcells.Oncecremated,thatwaterandamajorityofourtissuesaredestroyed,leavinglittlebehind. Nailsandhairdonotcontinuetogrowafterwedie.Theydoappearlongerwhenwedie,however,astheskindehydratesandpullsbackfromthenailbedsandscalp. Bytheageof60,mostpeoplewillhavelostabouthalftheirtastebuds.Perhapsyoushouldn’ttrustyourgrandma’scookingasmuchasyoudo.Olderindividualstendtolosetheirabilitytotaste,andmanyfindthattheyneedmuchmoreintenseflavoringinordertobeabletofullyappreciateadish. Youreyesarealwaysthesamesizefrombirthbutyournoseandearsneverstopgrowing.Whenbabieslookupatyouwiththosebigeyes,they’rethesamesizethatthey’llbecarryingaroundintheirbodiesfortherestoftheirlives.Theirearsandnose,however,willgrowthroughouttheirlivesandresearchhasshownthatgrowthpeaksinsevenyearcycles. By60yearsofage,60-percentofmenand40-percentofwomenwillsnore.Ifyou’veeverbeenkeptawakebyasnoringlovedoneyouknowthesoundcanbedeafening.Normalsnoresaveragearound60decibels,thenoiselevelofnormalspeech,intensesnorescanreachmorethan80decibels,theapproximatelevelcausedbyajackhammerbreakingupconcrete. Ababy’sheadisone-quarterofit’stotallength,butbyage25willonlybeone-eighthofitstotallength.Asitturnsout,ouradorablyoversizedbabyheadswon’tchangesizeasdrasticallyastherestofourbody.Thelegsandtorsowilllengthen,buttheheadwon’tgetmuchlonger. DiseaseandInjury Mostofuswillgetinjuredorsickatsomepointinourlives.Herearesomefactsonhowthehumanbodyreactstothestressesanddangersfromtheoutsideworld.   Mondayisthedayoftheweekwhentheriskofheartattackisgreatest.YetanotherreasontoloatheMondays!AtenyearstudyinScotlandfoundthat20%morepeopledieofheartattacksonMondaysthananyotherdayoftheweek.Researcherstheorizethatit’sacombinationoftoomuchfunovertheweekendwiththestressofgoingbacktoworkthatcausestheincrease. Humanscanmakedolongerwithoutfoodthansleep.Whileyoumightfeelbetterpreparedtostayupallnightpartyingthantogiveupeating,thatfeelingwillberelativelyshortlived.Providedthereiswater,theaveragehumancouldsurviveamonthtotwomonthswithoutfooddependingontheirbodyfatandotherfactors.Sleepdeprivedpeople,however,startexperiencingradicalpersonalityandpsychologicalchangesafteronlyafewsleeplessdays.Thelongestrecordedtimeanyonehasevergonewithoutsleepis11days,attheendofwhichtheexperimenterwasawake,butstumbledoverwords,hallucinatedandfrequentlyforgotwhathewasdoing. Asimple,moderatelyseveresunburndamagesthebloodvesselsextensively.Howextensively?Studieshaveshownthatitcantakefourtofifteenmonthsforthemtoreturntotheirnormalcondition.Considerthatthenexttimeyou’refeelingtoolazytoapplysunscreenbeforeheadingoutside. Over90%ofdiseasesarecausedorcomplicatedbystress.Thathighstressjobyouhavecouldbedoingmorethanjustwearingyoudowneachday.Itcouldalsobeincreasingyourchancesofhavingavarietyofseriousmedicalconditionslikedepression,highbloodpressureandheartdisease. Ahumanheadremainsconsciousforabout15to20secondsafteritisbeendecapitated.Whileitmightbegrosstothinkabout,thebloodintheheadmaybeenoughtokeepsomeonealiveandconsciousforafewsecondsaftertheheadhasbeenseparatedfromthebody,thoughreportsastotheaccuracyofthisarewidelyvarying. e-Ítaca © 2022 CONTACTACONNOSOTROS        departamentos   AdministraciónyGestión BiologíayGeología EducaciónFísica FísicayQuímica Francés Griego Latín Matemáticas Tecnología ArtesPlásticas Economía Filosofía FOL GeografíaeHistoria Informática Inglés LenguayLiteratura Música Orientación   comunidad   Profesores Alumnos ConsejoEscolar APA PIEE CompañerosAyudantes AsociacióndeAlumnos CoroÍtaca Bancodelibros Deporte Extraescolar EscuelaPromotoradeSalud Cafetería(Facebook)   centro   SIGADpadres Extraescolares OfertaEducativa Bilingüismo Tutorías Localización Términosdeuso PolíticadePrivacidad LogosÍtaca Encuestas Accesoprivado