Leaf

• Blade - flat, typically green, expanded part of the leaf that carries out photosynthesis.

  
• Veins - transport water, nutrients, and sugars to and from the blade.

  
• Midrib - a central vein that runs through the center of the blade.

  
• Margin - edge of the leaf

  
• Apex - the tip of the leaf

  
• Base - the attaching part of the petiole

  
• Petiole - stalk that attaches the blade to the stem of the plant

  
• Cuticle - waxy layer to prevent water loss.

  
• Stomata - small openings for gas exchange.