Transport system in plants

  1. Why a need for transport system
    • Unicellular organism
    • •No need for transport system because it is exposed to the surroundings directly.
    • •Cell obtains the essential nutrients and gases from its surroundings and remove wastes through simple diffusion.
    • Multicellular organism
    • •Cells are not directly exposed to surroundings.
    • •They are located far away from the source of nutrients.
    • •In order to obtain nutrients and remove waste product effectively, an efficient transport system is needed.
  2. Transport system in living things
    • Plants
    • 2 separate systems
    • Xylem vessels
    • –Transport water and dissolved minerals
    • –Upward movement from roots to leaves
    • Phloem vessels
    • –Transport food made in the leaves
    • –Movement in all directions

    • Humans
    • •Circulatory system – closed system
    • –Heart
    • –Blood vessels
    • –Blood
  3. Transport in plants Image Upload 1
    • •Arrangement of xylem and phloem
    • –Root
    • –Stem
    • –Leaf

    •Uptake and transport of water and ions(minerals).
  4. Arrangement of xylem and phloem tissues
    Xylem and phloem tissues are grouped together to form the vascular bundles

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  5. Arrangement of xylem and phloem tissues
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  6. How does root adapt itself to carry out the function of absorption

    •How is water absorbed by the roots?
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  7. Adaptation for Uptake of water
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    • 1.Has many root hairs to increase the surface area by developing elongated structures so water can be absorbed in a faster rate.
    • How does plant take in water from the soil?
    • 1.The solution inside the cell is more concentrated than in the soil particles
    • •Lower water potential than the soil.
    • •Water can enter by osmosis
  8. How does plant transport water from cell to cell?
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  9. 1. Once inside the root hair cell, the water dilutes the solution in the cytoplasm.
    • 2. The cytoplasm is now less concentrated compared to the root cell next to it.
    • 3. Water moves to the root cell by osmosis.
    • 4. The process continues throughout the root cells until it reaches the xylem vessel.
    • 5. When the water evaporates in leaves, it creates a pulling force that move the water up the stem to the leaves.–transpirational pull
  10. How does plant take up minerals from the soil?
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    • •Soil water contains high concentration of dissolved mineral salts compared to the solution in the root hair cells.
    • •Mineral salts enter root cells by diffusion.
  11. What happens when soil has less mineral salts than the root cells?
    • •Mineral salts will enter the root hair cells by active transport.
    • –Active transport is a process when a substance moves from its region of low concentration to its region of high concentration. Energy is involved.
  12. How is food (glucose) transported through out the plant?
    • • Food made in the leaves is needed by all the cells in the plant.
    • • Phloem tissue transports the food to all parts of the plants upwardly and downwardly
    • • The movement of food from leaf to other parts of the plants is called translocation.
Card Set
Transport system in plants