Plant

• Epidermal tissue


  Covers the whole plant
• palisade mesophyll


  photosynthesis happens
• spongy mesophyll


  Air space to allow gases to diffuse in and out
• Xylem and phloem


  Transport, water, mineral, irons, and food
• Meristem


  Found the growing tips of the shoots and roots
• Epidermal tissue function


  Covered with a wax cuticle to reduce water loss
• Upper epidermis function


  Transparent so light can go to the palisade layer
• Palisade layer function


  Lots of chloroplasts
• xylem and phloem function

  Deliver water and nutrients
• Lower epidermis function


  Stomata for gaseous exchange
• Phloem tubes


  Elongated living cells with small paws for cell sap to flow. The transport goes both ways and this is called translocation.
• Xylem tubes


  Dad sells with no end wall, carry water and mineral
• Transpiration


  loss of water from a plant through its leaves pets a slight shortage of water, so more water can be drawn up from the roots
• Guard cells


  Open a close the stomata, lots of water they are turgid and closed shortage of water they are flaccid and closed
• Transpiration affected by


  light intensity, temperature, air flow, humidity
• Light intensity


  Increase brightness increases the transpiration rate

  Stomata is closed when it's dark as photosynthesis cannot happen
• Temperature


  Warm equals faster, transpiration warmer particles have more energy to evaporate and diffuse
• Air flow


  Better air flow equals great transpiration because it maintains a low concentration gradient outside the leaf
• Humidity


  Dry, the air around the leaf, the faster transpiration , humid air means lots of water so no concentration gradient