Xylem and phloem (Other in-depth notes)
- Transports water and soluble minerals UP the plant from the roots
What is it composed of?
> Tracheid (Yes, that’s the spelling)
> 1 - Vessels
- It has lignin walls, which means they are dead. Hence, they have no contents inside
- They are linked end-to-end which creates a continuous column with proliferation plates
- Contains pits/pores
> 2 - Tracheids
- These also contain lignin. They are not found in the same plant as xylem vessels. Xylem vessels are fatter and shorter.
- Linked end-to-end
- Sloped ends with pores/pits in them
> 3 - Fibres
- The walls have lignin in
- Do not transport water and run along side the xylem vessel
- It’s function is to act as support
> 4 - Parenchyma
- They are actually living!
- Provide turgidity, which is basically providing support
- Stores starch and minerals
So, some general points on structure -