Specialised plant cells

• specialised cells 


  cells that have special adaptations which help them carry out a particular function
• what is the process that when a cell is specialised scientist call?

  differentaition
• What is the main function of the palisade cell?


  carries out photosynthesis to make plant food
• How is palisade cells adapted ?

  • packed with chloroplast to absorb sunlight
• What would have if the palisade cell doesnt work ?

  leaves would turn yellowish/reddish
• What is the main function of the root hair cell?

  it can absorb water and dissolved minerals
• How has the root cell adapted?

  • the hairs increase surface area
  • they do not contain chloroplast as they are underground
• What is the main function of xylem tubes ?

  they carry water and dissolved minerals from the roots to the leaves
• How are xylem tubes adapted ?

  • they are long tubes
  • have VERY thick walls containing lignin (to support the plant )
  • but since they are sealed with lignin this causes it to die
  • the end walls between the cells have broken down so now it forms a long tube so water can flow freely
  • no nucleus, cytoplasm, vacuole or chloroplast
• What is the main function of phloem?

  carry dissolved sugars up and down the plant
• What is a phloem vessel cell and sieve tubes ?

  • has no nucleus and only LIMITED cytoplasm
  • the end walls of vessel cells have pores (sieve tubes )
  • allow dissolved sugars to move through the cell interior
• What is a companion cells ?

  its the companion by the pores and the mitochondria provides energy to the phloem cell