Plant function

• Structure of the leaf

  1. Waxy cuticle

  2. Upper epidermis

  3. Palisade cells

  4. Air spaces

  5. Spongy mesophyll layer

  6. Stomata

  7. Lower epidermis

  8. Guard cells
• where are most stomata found Most stomata are found on the lower epidermis
• Guard cells


  Cells that open and close stomata to allow gas exchange
• Cell walls of dead cells are called lignin
• Site of water evaporation from the leaves is the stomata