Stems, Leaves and Plants
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Stems, Leaves and Plants

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Viviana Ramirez

Viviana Ramirez
3rd period

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Stems, Leaves and Plants Stems, Leaves and Plants Presentation Transcript

  • Stem Structure and Function
    • Stem Have Three Important Tasks:
      • To support leaves, branches and flowers.
      • Hold them up in the sunlight.
      • They transfer substances between roots and leaves.
  • The Different Stems and Tissue Types
    • Different Tissue Types:
    • - Vascular Tissue : Conducts water, nutrients and other compounds up and down the plant.
    • - Xylem and Phloem Tissues: form continuous tubes from the roots to the stems and to the leaves.
    • 2. Different Stems:
    • - Monocot Stems: when vascular bundles are scattered throughout the stem. The epidermis encloses vascular bundles.
    • - Dicot Stems: The Vascular bundles are arranged in a cylinder.
    • The Monocot and Dicot are two types of stems on flowers
  • The Different Types of Stem Growths
    • Primary Growth:
    • - This is a type of growth only occurring at the ends of stems.
    • - Is made by cell division and takes place in the apical meristem.
    • -The length of the stem!
    • 2. Secondary Growth:
    • - Is a pattern of growth in which a stem/ plant increases in width.
    • - This takes place in lateral meristematic tissues called the vascular cambium or cork cambium.
    • - Thickness of a stem!
  • Stems Adapted for Storage and Dormancy
    • Tuber Stem: A stem usually grown underground that stores food.
    • Bulb Stem: This is made up of a central stem surrounded by short, thick leaves.
    • Corm Stem: This looks similar to a bulb but contains a thickened stem and has a covering that consists of leaves.
    • Rhizome Stem: This is a stem of a ginger and it is a horizontal underground stem.
  • Works Cited
    • File:Oca.jpg . Photograph. Wikipedia.org . 24 Jan. 2010. Web. 10 Mar. 2010. <http://en.wikipedia.org/wiki/File:Oca.jpg>.
    • Photograph. File:Stem Nodes.jpg . 9 Mar. 2010. Web. 10 Mar. 2010. <http://en.wikipedia.org/wiki/File:Stem_nodes.jpg>.
    • Photograph. Flowering Plants . 2002. Web. 10 Mar. 2010. <http://biology.unm.edu/ccouncil/Biology_203/Summaries/FloweringPlants.htm>.
    • Photograph. Web. 10 Mar. 2010. <http://www.biology.iastate.edu/Courses/212L/New%20Site/25rtstm%20index.html>.