Leaf structure

• Leaf structure

  A) Waxy cuticle

  B) Palisade cells

  C) veins

  D) Stomata

  E) Guard cells

  F) air spaces

  
• Why are thin walls good for the leaf?

  Short diffusion distance for gases
• Why is a large surface area good for a leaf?

  Absorbs lots of light
• Waxy cuticle role

  prevents water loss
• Palisade cells role

  Contains many chloroplasts for photosynthesis
• Air spaces role

  allows gases to diffuse through the spongy layer
• Stomata role

  Allows gases to diffuse into the leaf
• Guard cells role

  Open and close the stomata to control water loss
• Phloem tubes role

  Transports water through the plant
• Xylem tubes role

  Transports sugars around the plant
• What part of the plant absorbs water and mineral ions

  roots