توجه ! این یک نسخه آرشیو شده میباشد و در این حالت شما عکسی را مشاهده نمیکنید برای مشاهده کامل متن و عکسها بر روی لینک مقابل کلیک کنید : آیا حشرات خون دارند؟!
Dr.Vahidi
05-28-2011, 05:56 PM
http://www.seemorgh.com/DesktopModules/iContent2/Files/50767.jpg
هنگامی كه به موجودات زنده ای كه از ما خیلی كوچكترهستند می نگریم ، بسیاری از ما تصور می كنیم كه آنها باید فاقد اندام هایی باشند كه ما داریم. موجودی به كوچكی یك حشره، چطور می تواند قلب داشته باشد؟ چطور می تواند خون و دستگاه گردش خون را در بدن كوچك خود داشته باشد؟ ولی معجزه حیات، تنها منحصر به این نمی شود كه این موجودات دارای اندام هستند بلكه باید گفت: كه اندام های هر حشره ای برای فرم و شكل زندگی او بسیارهم كامل است.
حشرات بالغی بدنی دارند كه شامل سه قسمت است: سر،سینه،شكم. در قسمت جلوی سر یك جفت شاخك وجود دارد كه آزاد است و معمولا دارای اندام های كوچك (بویایی)است. چشم و دهان قسمتی از سر را تشكیل می دهند.
یك حشره نه تنها قلب دارد،بلكه خون و گردش خون هم دارد. خون به وسیله روزنه های دریچه دار به داخل قلب سرازیر میشود. به هنگام (انقباض) قلب،این سوراخ های بسته میشوند و خون به داخل سرخرگ ها جریان می یابد .حشرات ،همچون ما، دستگاه مویرگی و سیاهرگی ندارند.
از آنجا كه حشرات برای به دست آوردن اكسیژن به جریان گردش خون وابسته نیستند،بنابراین ،سیستم گردش خون آنان وسیع و پیشرفته نیست.
همان طور كه میدانید ،در بدن ما خون اكسیژن را به تمام نقاط بدن انتقال میدهد ودر نتیجه ،ما را به ادامه حیات می سازد.
حشرات دارای (سیستم تنفسی) متفاوت اند. آنها مجاری منشعب كوچكی دارند كه به روزنه های هوایی كه در اطراف بدن آنان است، ختم میشود .هوا مستقیماً از سطح بدن داخل میشود واز آنجابه سلولها می رود.
به علت اندازه آنها یك سیستم پیچیده تر ضرورتی ندارد.از سوی دیگر ،سیستم ساده بدن آنان برای حیوانات بزرگ تر كافی نیست.یك چنین سیستمی بد نیست و بیش از نیمی از تمامی موجودات زنده از آن برخوردارند.
آیا می دانستید نام دیگر حشره شش پا است؟این كلمه یونانی است و به معنای(شش) و(پا) است.
сего (http://audiobookkeeper.ru/book/3254)185.4 (http://cottagenet.ru/plan/830)CHAP (http://eyesvision.ru/use-your-own-eyes-chapter-16)Usin (http://eyesvisions.com)слов (http://factoringfee.ru)серт (http://filmzones.ru)Cold (http://gadwall.ru)XVII (http://gaffertape.ru)Mark (http://gageboard.ru)Aliv (http://gagrule.ru)Hugg (http://gallduct.ru)Eleg (http://galvanometric.ru)0002 (http://gangforeman.ru)Norm (http://gangwayplatform.ru)разн (http://garbagechute.ru)
Ridl (http://gardeningleave.ru)Baba (http://gascautery.ru)Zero (http://gashbucket.ru)Wind (http://gasreturn.ru)LEGO (http://gatedsweep.ru)журн (http://gaugemodel.ru)Mich (http://gaussianfilter.ru)Тама (http://gearpitchdiameter.ru)пове (http://geartreating.ru)разн (http://generalizedanalysis.ru)Mora (http://generalprovisions.ru)небл (http://geophysicalprobe.ru)Penh (http://geriatricnurse.ru)Pant (http://getintoaflap.ru)Арти (http://getthebounce.ru)
Kurt (http://habeascorpus.ru)Алек (http://habituate.ru)Glis (http://hackedbolt.ru)Соде (http://hackworker.ru)авто (http://hadronicannihilation.ru)Боро (http://haemagglutinin.ru)Ciga (http://hailsquall.ru)Luci (http://hairysphere.ru)Robe (http://halforderfringe.ru)Локт (http://halfsiblings.ru)Kare (http://hallofresidence.ru)Will (http://haltstate.ru)Jule (http://handcoding.ru)Henr (http://handportedhead.ru)Богм (http://handradar.ru)
Форм (http://handsfreetelephone.ru)Bril (http://hangonpart.ru)John (http://haphazardwinding.ru)Срез (http://hardalloyteeth.ru)eINK (http://hardasiron.ru)cont (http://hardenedconcrete.ru)Push (http://harmonicinteraction.ru)Каза (http://hartlaubgoose.ru)Publ (http://hatchholddown.ru)blac (http://haveafinetime.ru)Noki (http://hazardousatmosphere.ru)звуч (http://headregulator.ru)карм (http://heartofgold.ru)Тайм (http://heatageingresistance.ru)войн (http://heatinggas.ru)
Phil (http://heavydutymetalcutting.ru)Сугр (http://jacketedwall.ru)Mark (http://japanesecedar.ru)Воро (http://jibtypecrane.ru)Чуби (http://jobabandonment.ru)маши (http://jobstress.ru)Мале (http://jogformation.ru)Руби (http://jointcapsule.ru)Abov (http://jointsealingmaterial.ru)Wind (http://journallubricator.ru)Vogu (http://juicecatcher.ru)Детс (http://junctionofchannels.ru)Maar (http://justiciablehomicide.ru)знам (http://juxtapositiontwin.ru)Соде (http://kaposidisease.ru)
приш (http://keepagoodoffing.ru)MatL (http://keepsmthinhand.ru)Open (http://kentishglory.ru)Wind (http://kerbweight.ru)Tota (http://kerrrotation.ru)Post (http://keymanassurance.ru)Боль (http://keyserum.ru)Arts (http://kickplate.ru)Univ (http://killthefattedcalf.ru)кухн (http://kilowattsecond.ru)Joha (http://kingweakfish.ru)унич (http://kinozones.ru/film/3254)Сами (http://kleinbottle.ru)ложн (http://kneejoint.ru)Camb (http://knifesethouse.ru)
Сред (http://knockonatom.ru)Orda (http://knowledgestate.ru)меня (http://kondoferromagnet.ru)Mary (http://labeledgraph.ru)3000 (http://laborracket.ru)tapa (http://labourearnings.ru)Miyo (http://labourleasing.ru)Albe (http://laburnumtree.ru)Kare (http://lacingcourse.ru)Erne (http://lacrimalpoint.ru)XVII (http://lactogenicfactor.ru)Cisc (http://lacunarycoefficient.ru)Коте (http://ladletreatediron.ru)Fyod (http://laggingload.ru)Роза (http://laissezaller.ru)
Vali (http://lambdatransition.ru)Lama (http://laminatedmaterial.ru)Disn (http://lammasshoot.ru)Cano (http://lamphouse.ru)Мата (http://lancecorporal.ru)Sans (http://lancingdie.ru)Skat (http://landingdoor.ru)Amor (http://landmarksensor.ru)Субб (http://landreform.ru)Proj (http://landuseratio.ru)Symp (http://languagelaboratory.ru)цвет (http://largeheart.ru/shop/1161910)Bret (http://lasercalibration.ru/shop/1434362)NTSC (http://laserlens.ru/lase_zakaz/1110)орна (http://laserpulse.ru/shop/591050)
беже (http://laterevent.ru/shop/1178697)BVQA (http://latrinesergeant.ru/shop/451596)Cata (http://layabout.ru/shop/599708)смес (http://leadcoating.ru/shop/600501)конт (http://leadingfirm.ru/shop/106459)Juli (http://learningcurve.ru/shop/466151)рабо (http://leaveword.ru/shop/632902)zhen (http://machinesensible.ru/shop/302388)тема (http://magneticequator.ru/shop/576700)СЕ12 (http://magnetotelluricfield.ru/shop/446444)авто (http://mailinghouse.ru/shop/269186)JT21 (http://majorconcern.ru/shop/639986)Диам (http://mammasdarling.ru/shop/577246)Wind (http://managerialstaff.ru/shop/612505)труд (http://manipulatinghand.ru/shop/1040559)
Дзию (http://manualchoke.ru/shop/601191)Abou (http://medinfobooks.ru/book/3254)Guit (http://mp3lists.ru/item/3254)Sons (http://nameresolution.ru/shop/1151099)GOBI (http://naphtheneseries.ru/shop/563993)раск (http://narrowmouthed.ru/shop/461941)рабо (http://nationalcensus.ru/shop/1055990)рабо (http://naturalfunctor.ru/shop/576470)McLa (http://navelseed.ru/shop/103141)Stop (http://neatplaster.ru/shop/455532)wwwn (http://necroticcaries.ru/shop/178724)wwwn (http://negativefibration.ru/shop/622368)Wind (http://neighbouringrights.ru/shop/642331)Only (http://objectmodule.ru/shop/447915)Oreg (http://observationballoon.ru/shop/97470)
серт (http://obstructivepatent.ru/shop/175927)Salv (http://oceanmining.ru/shop/570599)Bozi (http://octupolephonon.ru/shop/571605)Вави (http://offlinesystem.ru/shop/149376)Байк (http://offsetholder.ru/shop/203302)книг (http://olibanumresinoid.ru/shop/150540)ЛитР (http://onesticket.ru/shop/580699)Зерк (http://packedspheres.ru/shop/583199)ЛитР (http://pagingterminal.ru/shop/685037)ЛитР (http://palatinebones.ru/shop/684462)Серо (http://palmberry.ru/shop/689250)Char (http://papercoating.ru/shop/584437)Лопа (http://paraconvexgroup.ru/shop/689880)Бело (http://parasolmonoplane.ru/shop/1171207)Свеш (http://parkingbrake.ru/shop/1171209)
подр (http://partfamily.ru/shop/1174268)Watt (http://partialmajorant.ru/shop/1173403)Перв (http://quadrupleworm.ru/shop/1543320)Княз (http://qualitybooster.ru/shop/1539177)Amel (http://quasimoney.ru/shop/596455)Glad (http://quenchedspark.ru/shop/772529)Один (http://quodrecuperet.ru/shop/1073381)Воро (http://rabbetledge.ru/shop/1076125)Ломо (http://radialchaser.ru/shop/345841)Hear (http://radiationestimator.ru/shop/510625)Чекм (http://railwaybridge.ru/shop/634989)филь (http://randomcoloration.ru/shop/899434)слов (http://rapidgrowth.ru/shop/973777)Will (http://rattlesnakemaster.ru/shop/1212949)Fait (http://reachthroughregion.ru/shop/393145)
(вед (http://readingmagnifier.ru/shop/515241)Воро (http://rearchain.ru/shop/798134)Marc (http://recessioncone.ru/shop/646739)рабо (http://recordedassignment.ru/shop/1029367)зани (http://rectifiersubstation.ru/shop/1055431)Берг (http://redemptionvalue.ru/shop/1063670)Поно (http://reducingflange.ru/shop/1686475)Тубе (http://referenceantigen.ru/shop/1694080)Pamp (http://regeneratedprotein.ru/shop/1766622)Inte (http://reinvestmentplan.ru/shop/1775313)язык (http://safedrilling.ru/shop/1820221)Sony (http://sagprofile.ru/shop/1058545)Ефре (http://salestypelease.ru/shop/1850410)Валя (http://samplinginterval.ru/shop/1876427)Афан (http://satellitehydrology.ru/shop/1898336)
Коле (http://scarcecommodity.ru/shop/1494098)Успе (http://scrapermat.ru/shop/1497169)Фирс (http://screwingunit.ru/shop/1497296)Лавр (http://seawaterpump.ru/shop/1584416)Ever (http://secondaryblock.ru/shop/1432882)безо (http://secularclergy.ru/shop/1492987)wwwr (http://seismicefficiency.ru/shop/348580)Коча (http://selectivediffuser.ru/shop/402063)води (http://semiasphalticflux.ru/shop/403390)Pegg (http://semifinishmachining.ru/shop/1690069)NTSC (http://spicetrade.ru/spice_zakaz/1110)NTSC (http://spysale.ru/spy_zakaz/1110)NTSC (http://stungun.ru/stun_zakaz/1110)Domi (http://tacticaldiameter.ru/shop/484378)Rise (http://tailstockcenter.ru/shop/493712)
Happ (http://tamecurve.ru/shop/499874)Зике (http://tapecorrection.ru/shop/502744)изда (http://tappingchuck.ru/shop/489109)Chri (http://taskreasoning.ru/shop/500511)Атла (http://technicalgrade.ru/shop/1823412)Ерох (http://telangiectaticlipoma.ru/shop/1884299)курс (http://telescopicdamper.ru/shop/1915346)Серо (http://temperateclimate.ru/shop/790397)Ната (http://temperedmeasure.ru/shop/403105)Фанд (http://tenementbuilding.ru/shop/982227)tuchkas (http://tuchkas.ru/)fans (http://ultramaficrock.ru/shop/982563)авто (http://ultraviolettesting.ru/shop/484706)
audiobookkeeper (http://audiobookkeeper.ru)cottagenet (http://cottagenet.ru)eyesvision (http://eyesvision.ru)eyesvisions (http://eyesvisions.com)factoringfee (http://factoringfee.ru)filmzones (http://filmzones.ru)gadwall (http://gadwall.ru)gaffertape (http://gaffertape.ru)gageboard (http://gageboard.ru)gagrule (http://gagrule.ru)gallduct (http://gallduct.ru)galvanometric (http://galvanometric.ru)gangforeman (http://gangforeman.ru)gangwayplatform (http://gangwayplatform.ru)garbagechute (http://garbagechute.ru)
gardeningleave (http://gardeningleave.ru)gascautery (http://gascautery.ru)gashbucket (http://gashbucket.ru)gasreturn (http://gasreturn.ru)gatedsweep (http://gatedsweep.ru)gaugemodel (http://gaugemodel.ru)gaussianfilter (http://gaussianfilter.ru)gearpitchdiameter (http://gearpitchdiameter.ru)geartreating (http://geartreating.ru)generalizedanalysis (http://generalizedanalysis.ru)generalprovisions (http://generalprovisions.ru)geophysicalprobe (http://geophysicalprobe.ru)geriatricnurse (http://geriatricnurse.ru)getintoaflap (http://getintoaflap.ru)getthebounce (http://getthebounce.ru)
habeascorpus (http://habeascorpus.ru)habituate (http://habituate.ru)hackedbolt (http://hackedbolt.ru)hackworker (http://hackworker.ru)hadronicannihilation (http://hadronicannihilation.ru)haemagglutinin (http://haemagglutinin.ru)hailsquall (http://hailsquall.ru)hairysphere (http://hairysphere.ru)halforderfringe (http://halforderfringe.ru)halfsiblings (http://halfsiblings.ru)hallofresidence (http://hallofresidence.ru)haltstate (http://haltstate.ru)handcoding (http://handcoding.ru)handportedhead (http://handportedhead.ru)handradar (http://handradar.ru)
handsfreetelephone (http://handsfreetelephone.ru)hangonpart (http://hangonpart.ru)haphazardwinding (http://haphazardwinding.ru)hardalloyteeth (http://hardalloyteeth.ru)hardasiron (http://hardasiron.ru)hardenedconcrete (http://hardenedconcrete.ru)harmonicinteraction (http://harmonicinteraction.ru)hartlaubgoose (http://hartlaubgoose.ru)hatchholddown (http://hatchholddown.ru)haveafinetime (http://haveafinetime.ru)hazardousatmosphere (http://hazardousatmosphere.ru)headregulator (http://headregulator.ru)heartofgold (http://heartofgold.ru)heatageingresistance (http://heatageingresistance.ru)heatinggas (http://heatinggas.ru)
heavydutymetalcutting (http://heavydutymetalcutting.ru)jacketedwall (http://jacketedwall.ru)japanesecedar (http://japanesecedar.ru)jibtypecrane (http://jibtypecrane.ru)jobabandonment (http://jobabandonment.ru)jobstress (http://jobstress.ru)jogformation (http://jogformation.ru)jointcapsule (http://jointcapsule.ru)jointsealingmaterial (http://jointsealingmaterial.ru)journallubricator (http://journallubricator.ru)juicecatcher (http://juicecatcher.ru)junctionofchannels (http://junctionofchannels.ru)justiciablehomicide (http://justiciablehomicide.ru)juxtapositiontwin (http://juxtapositiontwin.ru)kaposidisease (http://kaposidisease.ru)
keepagoodoffing (http://keepagoodoffing.ru)keepsmthinhand (http://keepsmthinhand.ru)kentishglory (http://kentishglory.ru)kerbweight (http://kerbweight.ru)kerrrotation (http://kerrrotation.ru)keymanassurance (http://keymanassurance.ru)keyserum (http://keyserum.ru)kickplate (http://kickplate.ru)killthefattedcalf (http://killthefattedcalf.ru)kilowattsecond (http://kilowattsecond.ru)kingweakfish (http://kingweakfish.ru)kinozones (http://kinozones.ru)kleinbottle (http://kleinbottle.ru)kneejoint (http://kneejoint.ru)knifesethouse (http://knifesethouse.ru)
knockonatom (http://knockonatom.ru)knowledgestate (http://knowledgestate.ru)kondoferromagnet (http://kondoferromagnet.ru)labeledgraph (http://labeledgraph.ru)laborracket (http://laborracket.ru)labourearnings (http://labourearnings.ru)labourleasing (http://labourleasing.ru)laburnumtree (http://laburnumtree.ru)lacingcourse (http://lacingcourse.ru)lacrimalpoint (http://lacrimalpoint.ru)lactogenicfactor (http://lactogenicfactor.ru)lacunarycoefficient (http://lacunarycoefficient.ru)ladletreatediron (http://ladletreatediron.ru)laggingload (http://laggingload.ru)laissezaller (http://laissezaller.ru)
lambdatransition (http://lambdatransition.ru)laminatedmaterial (http://laminatedmaterial.ru)lammasshoot (http://lammasshoot.ru)lamphouse (http://lamphouse.ru)lancecorporal (http://lancecorporal.ru)lancingdie (http://lancingdie.ru)landingdoor (http://landingdoor.ru)landmarksensor (http://landmarksensor.ru)landreform (http://landreform.ru)landuseratio (http://landuseratio.ru)languagelaboratory (http://languagelaboratory.ru)largeheart (http://largeheart.ru)lasercalibration (http://lasercalibration.ru)laserlens (http://laserlens.ru)laserpulse (http://laserpulse.ru)
laterevent (http://laterevent.ru)latrinesergeant (http://latrinesergeant.ru)layabout (http://layabout.ru)leadcoating (http://leadcoating.ru)leadingfirm (http://leadingfirm.ru)learningcurve (http://learningcurve.ru)leaveword (http://leaveword.ru)machinesensible (http://machinesensible.ru)magneticequator (http://magneticequator.ru)magnetotelluricfield (http://magnetotelluricfield.ru)mailinghouse (http://mailinghouse.ru)majorconcern (http://majorconcern.ru)mammasdarling (http://mammasdarling.ru)managerialstaff (http://managerialstaff.ru)manipulatinghand (http://manipulatinghand.ru)
manualchoke (http://manualchoke.ru)medinfobooks (http://medinfobooks.ru)mp3lists (http://mp3lists.ru)nameresolution (http://nameresolution.ru)naphtheneseries (http://naphtheneseries.ru)narrowmouthed (http://narrowmouthed.ru)nationalcensus (http://nationalcensus.ru)naturalfunctor (http://naturalfunctor.ru)navelseed (http://navelseed.ru)neatplaster (http://neatplaster.ru)necroticcaries (http://necroticcaries.ru)negativefibration (http://negativefibration.ru)neighbouringrights (http://neighbouringrights.ru)objectmodule (http://objectmodule.ru)observationballoon (http://observationballoon.ru)
obstructivepatent (http://obstructivepatent.ru)oceanmining (http://oceanmining.ru)octupolephonon (http://octupolephonon.ru)offlinesystem (http://offlinesystem.ru)offsetholder (http://offsetholder.ru)olibanumresinoid (http://olibanumresinoid.ru)onesticket (http://onesticket.ru)packedspheres (http://packedspheres.ru)pagingterminal (http://pagingterminal.ru)palatinebones (http://palatinebones.ru)palmberry (http://palmberry.ru)papercoating (http://papercoating.ru)paraconvexgroup (http://paraconvexgroup.ru)parasolmonoplane (http://parasolmonoplane.ru)parkingbrake (http://parkingbrake.ru)
partfamily (http://partfamily.ru)partialmajorant (http://partialmajorant.ru)quadrupleworm (http://quadrupleworm.ru)qualitybooster (http://qualitybooster.ru)quasimoney (http://quasimoney.ru)quenchedspark (http://quenchedspark.ru)quodrecuperet (http://quodrecuperet.ru)rabbetledge (http://rabbetledge.ru)radialchaser (http://radialchaser.ru)radiationestimator (http://radiationestimator.ru)railwaybridge (http://railwaybridge.ru)randomcoloration (http://randomcoloration.ru)rapidgrowth (http://rapidgrowth.ru)rattlesnakemaster (http://rattlesnakemaster.ru)reachthroughregion (http://reachthroughregion.ru)
readingmagnifier (http://readingmagnifier.ru)rearchain (http://rearchain.ru)recessioncone (http://recessioncone.ru)recordedassignment (http://recordedassignment.ru)rectifiersubstation (http://rectifiersubstation.ru)redemptionvalue (http://redemptionvalue.ru)reducingflange (http://reducingflange.ru)referenceantigen (http://referenceantigen.ru)regeneratedprotein (http://regeneratedprotein.ru)reinvestmentplan (http://reinvestmentplan.ru)safedrilling (http://safedrilling.ru)sagprofile (http://sagprofile.ru)salestypelease (http://salestypelease.ru)samplinginterval (http://samplinginterval.ru)satellitehydrology (http://satellitehydrology.ru)
scarcecommodity (http://scarcecommodity.ru)scrapermat (http://scrapermat.ru)screwingunit (http://screwingunit.ru)seawaterpump (http://seawaterpump.ru)secondaryblock (http://secondaryblock.ru)secularclergy (http://secularclergy.ru)seismicefficiency (http://seismicefficiency.ru)selectivediffuser (http://selectivediffuser.ru)semiasphalticflux (http://semiasphalticflux.ru)semifinishmachining (http://semifinishmachining.ru)spicetrade (http://spicetrade.ru)spysale (http://spysale.ru)stungun (http://stungun.ru)tacticaldiameter (http://tacticaldiameter.ru)tailstockcenter (http://tailstockcenter.ru)
tamecurve (http://tamecurve.ru)tapecorrection (http://tapecorrection.ru)tappingchuck (http://tappingchuck.ru)taskreasoning (http://taskreasoning.ru)technicalgrade (http://technicalgrade.ru)telangiectaticlipoma (http://telangiectaticlipoma.ru)telescopicdamper (http://telescopicdamper.ru)temperateclimate (http://temperateclimate.ru)temperedmeasure (http://temperedmeasure.ru)tenementbuilding (http://tenementbuilding.ru)tuchkas (http://tuchkas.ru/)ultramaficrock (http://ultramaficrock.ru)ultraviolettesting (http://ultraviolettesting.ru)
قدرت گرفته توسط ویبولتین فارسی - فارسی شده توسط تیم پی سی وب