structure and function

• cell wall structure

  made of cellulose forming a sieve like network
• chloroplast structure


  double membrane and is filled with fluid called stoma. inner membrane is continuous network of flattened sacs called thylakoids
• granum


  stack of thylakoids called granum (grana plural), contains chlorophyll pigment
• vacuole structure


  membrane bound sac in cytoplasm that contains cell sap
• tonoplast structure

  partially permeable membrane of vacuole
• amyloplast structure


  double membrane sac containing starch granules
• plasmodesmata structure

  microscope channels which cross the cell walls of plant cells
• pits structure

  pores in the cell walls of xylem
• cell wall function


  protects and support each cell and the whole plant
• chloroplast function

  site of photosynthesis, light energy trapped by chlorophyll and used to produce carbohydrate molecules from water and carbon dioxide
• vacuole function


  maintain turgor to ensure a rigid framework in cell
• tonoplast function


  selectively permeable to allow small molecules to pass through
• amyloplast function


  responsible for synthesis and storage of starch granules
• plasmodesmata function

  enable transport and communication between individual plant cells
• pits function


  allow water to enter and leave xylem vessels