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3. cell structure
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3. cell structure

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

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