Xylem vs phloem

• xylem function


  conducts water and minerals from the roots to the rest of the plant (upwards only)
• phloem function


  conducts sugar and amino acids throughout the plant where required (upwards and downwards)
• xylem description

  • cells are long and thick walled forming narrow tubes within the plant
  • no cell wall between cells
  • cell wall is reinforced with lignin to prevent cells from collapsing

  
• phloem description


  Made up of 2 cells:

  1. sieve tube cells - have an elongated shape and the cell wall between is perforated into a sieve
  2. companion cells - next to sieve tube cells and supply them with nutrients

  
• xylem name of movement

  transpiration
• phloem name of movement

  translocation
• arrangement inside the plant

  xylem vascular bundles on the inside and phloem on the outside