Xylem + Phloem

• Xylem transports water and mineral ions from the roots to the leaves through the transpiration stream.
• Phloem transports sugar[sucrose] upwards and downwards through the plant by translocation.
• Phloem

  • joined to companion cells - carry out functions
  • sieve tubes - allow transport
• Xylem

  • made of dead cells
  • no end cell walls
  • thick side walls made of lignin - strengthen and support the plant