transport in plants

• function of epidermis


  covers the outer surface of the plant for protection
• function of palisade mesophyll


  main site of photosynthesis
• function of spongy mesophyll


  air spaces to allow diffusion through the leaf
• function of xylem vessels


  transports water and minerals through the plant
• function of phloem vessels


  transports dissolved food materials through the plant
• function of meristem tissue


  produces new cells for growth and repair
• what are stomata


  pores on the leave that allow gaseous exchange and water loss
• what is transpiration


  the loss of water from the leaves
• what factors affect transpiration


  temperature

  speed of air flow

  light intensity

  humidity
• what do guard cells do


  open and close the stomata
• what is translocation


  the movement of food through the phloem