transport in plants

• what does xylem do?

  • carries water and mineral salts from roots up shoot - leaves in transpiration stream
• what does phloem do?

  • phloem transports sugars - amino acids and sucrose from where they are made in the leaves and do translocation
• what do root hairs do?

  • cell contains long hairs which stick out of soil - covered with millions of microscopic hairs - plant gives large SA for absorbing water from soil
  • usualy a higher concentration of water in soil than in the plant - water drawn into root hair cell by osmosis