Made from dead cel
No cells walls between cells and a hole in the midd
Strengthened with lignin, prevents them collapsin
Carry water and mineral ions from the roots to the stem and leave
The loss of water by evapouration from the leaves.
The movement of water from the roots to the leaved is called
the transpiration stream
Water vapour evapourates from leaves through the stomata
Transpiraiton stream
This draws water up from the rest of the plant though the xylem
This means more water is drawn from the roots, so there's a
constant transpiration stream of water though the plant
Found on the lower surface of the leaf
Allow CO2 and oxygen to diffuse directly in and out of the leaf
When the plants have lots of water, guard cells fill with water and
become turgid, this opens the stomata so gases can be Stomata
exchanged for photosynthesis
No cells walls between cells and a hole in the midd
Strengthened with lignin, prevents them collapsin
Carry water and mineral ions from the roots to the stem and leave
The loss of water by evapouration from the leaves.
The movement of water from the roots to the leaved is called
the transpiration stream
Water vapour evapourates from leaves through the stomata
Transpiraiton stream
This draws water up from the rest of the plant though the xylem
This means more water is drawn from the roots, so there's a
constant transpiration stream of water though the plant
Found on the lower surface of the leaf
Allow CO2 and oxygen to diffuse directly in and out of the leaf
When the plants have lots of water, guard cells fill with water and
become turgid, this opens the stomata so gases can be Stomata
exchanged for photosynthesis
