3. cell structure

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3. cell structure

  1. 1. Cell Structure
  2. 2. Cell structure of wood <ul><li>Main function of tree cells are </li></ul><ul><ul><li>To transport water and minerals up the tree from the roots and energy rich sap down the tree from the leaves </li></ul></ul><ul><ul><li>To provide strength </li></ul></ul><ul><ul><li>To store food </li></ul></ul>
  3. 3. Hardwood Cell Structure <ul><li>Hardwood Cell Structure made up of 3 cell types: </li></ul><ul><ul><li>Vessels </li></ul></ul><ul><ul><li>Fibres </li></ul></ul><ul><ul><li>Parenchyma </li></ul></ul>
  4. 4. Hardwood Cell Structure - Vessels <ul><li>Vessels are long cylindrical cells </li></ul><ul><li>They are joined end to end, running vertically up the tree </li></ul><ul><li>Function is to transport water and minerals </li></ul>
  5. 5. Hardwood Cell Structure - Fibres <ul><li>Are long, thin cells </li></ul><ul><li>They have thick cell walls </li></ul><ul><li>Their function is to provide strength for the tree </li></ul>
  6. 6. Hardwood Cell Structure - Parenchyma <ul><li>Are soft rectangular cells </li></ul><ul><li>They surround vessel cells </li></ul><ul><li>Their function is to store food </li></ul>
  7. 7. Softwood Cell Structure <ul><li>Hardwood Cell Structure made up of 2 cell types: </li></ul><ul><ul><li>Tracheids </li></ul></ul><ul><ul><li>Parenchyma </li></ul></ul>
  8. 8. Softwood Cell Structure - Tracheids <ul><li>Are flame shaped cells </li></ul><ul><li>Run parallel to the trunk and branches </li></ul><ul><li>Have thick cell walls </li></ul><ul><li>Function is to provide strength and assist in the transporation of water </li></ul><ul><li>There cell walls contain small holes called PITS, which allow water and minerals pass from cell to cell </li></ul>

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