Stems, Leaves and Plants

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Viviana Ramirez
3rd period

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Stems, Leaves and Plants

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

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