Plants cont.

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Plants cont.

• Vascular Tissue

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Vascular Tissue Cells

• Series of tubes that transport fluids throughout
  the plant
• 2 types of vascular tissue xylem and phloem.

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Vascular Tissue Cells

• Xylem carries water and minerals from the roots
  to the leaves
• Phloem carries sugar produced in the leaves to
  all parts of the plant
• Xylem and phloem together are called vascular
  bundles

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Xylem Tissue

• Moves water and dissolved minerals from the roots
  up to the leaves
• Thick walled tubes (provide support)
• Cylindrical cells fuse
• Cytoplasm breaks down Cells die
• Non living cell walls become thin tubes

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Phloem Tissue

• Transports sucrose and other dissolved sugars
  from the leaves to other parts of the plant
• Formed from sieve tube cells making a continuous
  duct
• Alive! But do not have nucleus
• Connected to small nucleated companion cells
  that direct their activities

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Phloem Tissue
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Phloem Tissue
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Xylem and Phloem animation
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The rest of the plant

• Beyond the leaf

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Epidermis (Dermal Tissue)

• Outer layer of all surfaces
• One cell layer thick
• Not in woody plants in woody plants this is
  replaced by bark on the stem

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Link
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Use of sugar traveling in the phloem

• Provides energy for cellular processes
• Protein manufacturing
• Stored as starch in the roots (Carrots, and sweet
  potatoes) stems (ginger, potatoes) leaves (green
  onions, rhubarb)
• Making cellulose
• Forms the cell wall
• Fibrous structures
• Provide strength and support
• Can be associated with the lignin in the
  formation of wood

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