plant unit: roots, stems, and leaves. what are xylem and phloem? ► transport system ► similar to...
TRANSCRIPT
Plant Unit: Roots, Stems, and Plant Unit: Roots, Stems, and LeavesLeaves
What are Xylem and Phloem?What are Xylem and Phloem?
►Transport SystemTransport System►Similar to our veins and arteriesSimilar to our veins and arteries►Xylem – moves water from roots to Xylem – moves water from roots to
leavesleaves►Phloem – Transport nutrients and Phloem – Transport nutrients and
products of Photosynthesis throughout products of Photosynthesis throughout the plant. the plant.
XylemXylem
►Move water and other minerals from Move water and other minerals from roots to all other parts of plant.roots to all other parts of plant.
PhloemPhloem
►Moves the products of photosynthesis Moves the products of photosynthesis (sugar) from the leaf throughout the (sugar) from the leaf throughout the plant.plant.
Roots: Taproots and Fibrous Roots: Taproots and Fibrous
►Designed to anchor plant to ground.Designed to anchor plant to ground.►Absorbs water, oxygen, and other Absorbs water, oxygen, and other
dissolved minerals from soil.dissolved minerals from soil.►Stores some of the materials produced Stores some of the materials produced
by the plant.by the plant.
TaprootsTaproots►Described as central fleshy rootDescribed as central fleshy root►Taproot = main root of a plant.Taproot = main root of a plant.
Fibrous RootFibrous Root►Many fibrous roots are present at Many fibrous roots are present at
the same time. All branching from the same time. All branching from main plant.main plant.
►Grasses are an example of a Grasses are an example of a fibrous root system.fibrous root system.
Root TissuesRoot Tissues
►Roots are made of different tissues.Roots are made of different tissues.►EpidermisEpidermis►CortexCortex►Vascular TissuesVascular Tissues
Cross Sections Of RootsCross Sections Of Roots
Ranunculus root @ 40 XRanunculus root @ 40 XRanunculus root @ 100 X
Stems:Stems:
►Hold Leaves up in SunlightHold Leaves up in Sunlight►Transport water and minerals Transport water and minerals
between Leaves and Rootsbetween Leaves and Roots►Stem Parts: Stem Parts:
Epidermis Epidermis Cortex Cortex Vascular TissueVascular Tissue
Stems: WoodyStems: Woody
►Three major zones.Three major zones.
►XylemXylem►Bark Bark ►Vascular CambiumVascular Cambium
Cross Sections of StemsCross Sections of Stems
►Alfalfa stem @ 100 X Alfalfa stem @ 100 X
Corn Corn stem @ 100 X stem @ 100 X
Leaves: TissuesLeaves: Tissues
1. Cuticle1. Cuticle2. Epidermis2. Epidermis- Both Sides Both Sides
(Upper/Lower)(Upper/Lower)- StomataStomata- Guard CellsGuard Cells
2. Palisade Layer2. Palisade Layer3. Spongy Mesophyll3. Spongy Mesophyll4. Vascular Bundles4. Vascular Bundles
Plant DiagramPlant Diagram
Flower PartsFlower Parts
►Reproduction (sexual) takes place in Reproduction (sexual) takes place in the flower.the flower.
►Stamen=male reproductive systemStamen=male reproductive system►Pistil=female reproductive systemPistil=female reproductive system►Petals=color to attract pollinatorsPetals=color to attract pollinators►Sepals=outer part of flower; provides Sepals=outer part of flower; provides
protection to the ovary/ovule.protection to the ovary/ovule.
StamenStamen
► Consists of:Consists of: Anther=where the Anther=where the
pollen is made and pollen is made and stored.stored.
Pollen=contains Pollen=contains sperm cells.sperm cells.
Filament=supports Filament=supports the antherthe anther
PistilPistil
►Consists of:Consists of: Stigma=sticky surface for pollen to land onStigma=sticky surface for pollen to land on Style=connects stigma to ovaryStyle=connects stigma to ovary Ovary=contains ovules with egg—becomes the fruit Ovary=contains ovules with egg—becomes the fruit
we eat!we eat! Ovule=contains ONE egg—will become the seed!Ovule=contains ONE egg—will become the seed!
Flowers DiagramFlowers Diagram