儿童英语_走进植物王国_Plant_Kingdom_Part_One

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1、ThePlantKingdomPARTONE1ThePlantKingdom4GeneralCharacteristics:3)Theyhavechloroplasts2)Plantsmaketheirownfoodbyphotosynthesis1)Multi-celledorganismsorganellewherephotosynthesistakesplacechloroplasts-they’regreenbecausetheyhavechlorophyllthechemicalthatgivesplantstheirgreencolorChlorophyll-trapsl

2、ightenergyforphotosynthesis2Chloroplast3Chloroplast44GeneralCharacteristicsCont’d4)Plantcellshavecellwalls(animalcellsdonot)stiffcellwallsgivestructuretoeachcellalsosupportstheplantmadeofcellulosehaveholesthroughwhichcellssharecytoplasm&passnutrientssugars,water,andhormonescellswalls5Photosynth

3、esis:releasesoxygenProcessinwhichplantsusewater,carbondioxide,andenergyfromthesuntomakefoodPhotosynthesis-onlyoccursinthechloroplastsPrefixphotomeans:LightRootwordsynthesismeans:tomake6Whatprocessisillustratedhere?6CO2+6H2O+lightenergy=C6H12O6+6O2Photosynthesis7ProductsofPhotosynthesis8Howarepl

4、antsorganized?PLANTSSeedlessPlantsSeedPlantsAngiospermsGymnospermsFerns&relatedplantsMosses&relatedplantsVascularNonvascular92MainTypesofPlants2)NonvascularPlants1)VascularPlantsPLANTSVascularNonvascularbrokeninto2moresubgroupscalled:a)seedlessplantsb)seedplantsnotbrokenintosubgroups10VascularP

5、lantsVascularPlants-plantsthathavetube-likecellsintheirroots,stems,&leavesthatcarryH2OandnutrientsVascularcomesfromtheLatinword“vasculum”whichmeans“vessel”roots,stems,andleavesofaplantareallcalledorganstheylosetheirleaveslikeapetsheds11VascularPlants:3organsandtheirjobsVascularPlantOrgans:(root

6、s,stems,&leaves)ROOTS-anchorstheplantintothegroundSTEMS-LEAVES-placewhereallofthechloroplastsarelocatedtakesinH2O&nutrientsdirectlyfromthesoilcarrywatertoallpartsoftheplantholdstheleavesuptothesunlight12VascularPlants:2TypesofTubestube-likecellsthatcarrywater&dissolvedmineralsfromtherootstothel

7、eavestube-likecellsthatcarryfood,whichismadeintheleaves,toallpartsoftheplanteachonehasaspecificfunction(job)a)xylemb)phloemvascularplantshave2differenttypesoftube-likestructuresinsidethemthinkoftinypipes...likeaplumbingsystemXylem