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Plant Unit Roots_ Stems_ and Leaves

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					Plant Unit: Roots, Stems, and
            Leaves
  What are Xylem and Phloem?
► Transport System
► Similarto our veins and arteries
► Xylem – moves water from roots to leaves
► Phloem – Transport nutrients and products
  of Photosynthesis throughout the plant.
                 Xylem
► Move  water and other minerals from roots
 to all other parts of plant.
                 Phloem
► Moves the products of photosynthesis
 (sugar) from the leaf throughout the plant.
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
► Described ascentral fleshy root
► Taproot = main root of a plant.
          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
► Roots are made of different tissues.
► Epidermis
► Cortex
► Vascular Tissues
      Cross Sections Of Roots
Ranunculus root @ 40 X
                         Ranunculus root @
                         100 X
                 Stems:

► Hold Leaves up in Sunlight
► Transport water and minerals between
  Leaves and Roots
► Stem Parts:
   Epidermis
   Cortex
   Vascular Tissue
          Stems: Woody
► Three   major zones.



► Xylem
► Bark
► Vascular Cambium
       Cross Sections of Stems
► Alfalfa   stem @ 100 X

                           Corn stem @ 100 X
               Leaves: Tissues
1. Cuticle
2. Epidermis
-   Both Sides
    (Upper/Lower)
-   Stomata
-   Guard Cells
2. Palisade Layer
3. Spongy Mesophyll
4. Vascular Bundles
Plant Diagram
              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
► Consists  of:
 Anther=where the
  pollen is made and
  stored.
 Pollen=contains sperm
  cells.
 Filament=supports the
  anther
                        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!
Flowers Diagram

				
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posted:12/4/2011
language:English
pages:18