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Plant Unit: Roots, Stems, and Leaves. What are Xylem and Phloem?. Transport System Similar to our veins and arteries Xylem – moves water from roots to leaves Phloem – Transport nutrients and products of Photosynthesis throughout the plant. . Xylem.

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what are xylem and phloem
What are Xylem and Phloem?
  • Transport System
  • Similar to our veins and arteries
  • Xylem – moves water from roots to leaves
  • Phloem – Transport nutrients and products of Photosynthesis throughout the plant.
xylem
Xylem
  • Move water and other minerals from roots to all other parts of plant.
phloem
Phloem
  • Moves the products of photosynthesis (sugar) from the leaf throughout the plant.
roots taproots and fibrous
Roots: Taproots and Fibrous
  • Designed to anchor plant to ground.
  • Absorbs water, oxygen, and other dissolved minerals from soil.
  • Stores some of the materials produced by the plant.
taproots
Taproots
  • Described as central fleshy root
  • Taproot = main root of a plant.
fibrous root
Fibrous Root
  • Many fibrous roots are present at the same time. All branching from main plant.
  • Grasses are an example of a fibrous root system.
root tissues
Root Tissues
  • Roots are made of different tissues.
  • Epidermis
  • Cortex
  • Vascular Tissues
cross sections of roots
Cross Sections Of Roots

Ranunculus root @ 40 X

Ranunculus root @ 100 X

stems
Stems:
  • Hold Leaves up in Sunlight
  • Transport water and minerals between Leaves and Roots
  • Stem Parts:
    • Epidermis
    • Cortex
    • Vascular Tissue
stems woody
Stems: Woody
  • Three major zones.
  • Xylem
  • Bark
  • Vascular Cambium
cross sections of stems
Cross Sections of Stems
  • Alfalfa stem @ 100 X Corn stem @ 100 X
leaves tissues
Leaves: Tissues

1. Cuticle

2. Epidermis

  • Both Sides (Upper/Lower)
  • Stomata
  • Guard Cells

2. Palisade Layer

3. Spongy Mesophyll

4. Vascular Bundles

flower parts
Flower Parts
  • Reproduction (sexual) takes place in the flower.
  • Stamen=male reproductive system
  • Pistil=female reproductive system
  • Petals=color to attract pollinators
  • Sepals=outer part of flower; provides protection to the ovary/ovule.
stamen
Stamen
  • Consists of:
  • Anther=where the pollen is made and stored.
  • Pollen=contains sperm cells.
  • Filament=supports the anther
pistil
Pistil
  • Consists of:
  • Stigma=sticky surface for pollen to land on
  • Style=connects stigma to ovary
  • Ovary=contains ovules with egg—becomes the fruit we eat!
  • Ovule=contains ONE egg—will become the seed!
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