Specialisation in Plant cells

• Types of specialised plant cells:

  • Root hair cell
  • Xylem
  • Phloem
• How are Xylem adapted to their function?

  Hollow tubes for passage of water, walls thickened with lignin to support plant and no top or bottom walls to form hollow tubes
• How are Xylem adapted to their function?:

  • Hollow tubes for passage of water
  • Walls thickened with lignin to support plant
  • No top or bottom walls to form hollow tubes
• How are phloem adapted to their function?

  Made of living cells and supported by companion cells containing mitochondria for energy to pump sugar, sieve plates forming tubes to allow sugars to flow
• How are phloem adapted to their function?:

  • Made of living cells and supported by companion cells
  • Releasing energy to pump energy
  • Sieve plates forming tubes to allow sugars to flow
• How are root hair cells adapted to their function?

  Large surface area to absorb more water, large vacuole to absorb more water and lots of mitochondria to provide energy to pump ions inside it (by Active Transport)
• How are root hair cells adapted to their function?:

  • Large surface area to absorb more water
  • Large vacuole to absorb more water
  • Lots of mitochondria to provide energy to pump ions inside it (by Active Transport)
• Root Hair Cell:

  A) Ribosomes

  B) Cell Membrane

  C) Mitochondria

  D) Nucleus

  E) Cell Wall

  F) Cytoplasm

  G) Root Hair

  H) Vacuole

  
• Xylem's Structure:

  A) Thick Cell Wall (lignin)

  B) Hollow space

  C) No End walls

  
• Phloem's structure:

  A) Sieve Plate

  B) Companion Cell

  C) Cytoplasm

  
• What is the function of the phloem?


  Transporting dissolved sugar up and down
• What is the function of the xylem?


  Transporting water up the plant
• What is the function of the root hair cell?

  Absorbs water and minerals from the soil by active transport (against conc. gradient)