PLANT TISSUES: VASCULAR TISSUES

1
PLANT TISSUESVASCULAR TISSUES

• The Circulatory
• System of Plants!

2
The Vascular System

• For plants to survive, they must
• take in nutrients water from environment
• transport water up to the leaves, and glucose
  back down for storage
• The plants vascular system is their circulatory
  system designed to transport materials with the
  plant!

3
Plant Tissues

• Cells specialize to take on certain roles within
  the plant. Structures are formed from
  specialized tissues. (See Figure 1,pg. 286)
• Differentiation
• A change in the form of cells to allow them to
  carry out a particular function.

4
Plant Tissues (Cont)

• Meristematic Tissue
• Cells that can rapidly divide ? produce all
  growth in plants
• Unspecialized cells found at the tips of stems,
  roots, in rings around the stems of larger
  plants, etc.

5
Plant Tissues (Cont)

• Dermal Tissue
• Cells that protect the outer layers of a plant
  epidermis is the outermost layer.
• These cells protect plants from disease
  predators, and prevent water loss.
• On stems and leaves, these cells often produce a
  waxy cuticle.
• On roots, these cells have fine root hairs to aid
  in absorption of water.

6
Plant Tissues (Cont)

• Ground Tissue
• The internal non-vascular tissues
• Could be specialized for storage, support,
  photosynthesis, etc.

7
Plant Tissues (Cont)

• Vascular Tissue
• Cells that specialize in transport of water
  other substances among cells
• Two types of tissues
• Xylem
• Phloem

8
Vascular Tissues (Cont)

• Xylem
• water-conducting cells - from roots up to rest of
  the plant
• after maturation, these cells die leaving
  thick-walled, hollow cells that are pitted or
  open at the ends ? ideal for water transfer

9
Vascular Tissues (Cont)

• Phloem
• food-conducting cells - from one part of plant to
  another (mostly down towards roots)
• these living cells have large pores at their ends
  and share cytoplasm? ideal for food transfer

10
Types of Plants

• MONOCOTS
• Many vascular bundles throughout the stem
• DICOTS
• Vascular bundles arranged in a ring some form
  well-developed ring with bark, etc.
• THE END!!!