Download Root hair cells

Root hair cells
Water is absorbed
from soil into root
hair cells
Have high surface
area for absorption
of ions and
osmosis
High concentration
of dissolved ions in
root hair cells
promotes osmosis
Trees have an internet, and it works…
Fungal mycaelia suck up water and nutrients
that the fungus gather from the soil.
Water and minerals move from roots
into the XYLEM….
Why does water move UP through
xylem vessels?
Transport in Xylem
To help the flow of water xylem cells have:
no cytoplasm
holes in their cell walls and LIGNIN, spiral thickening to prevent them from collapsing under tension
PULL:
Water movement in xylem is caused by transpiration pull - the evaporation of water in the leaves causes
tension in the cells of the leaf and tension in the xylem tubes
STICK:
Cohesion sticks water together and creates tension in xylem.
Adhesion to the xylem cell walls
tends to pull water up the xylem vessel.
Capillary action pulls water up vessel
PUSH:
Water uptake through osmosis in the roots
pushes water into xylem
Water LEAVES the plant via the
stomata