Movement of water through plants (Xylem)

Movement of water through plants

ARRANGEMENT OF XYLEM IN ROOTS

ARRANGEMENT OF XYLEM IN STEMS

ARRANGEMENT OF XYLEM IN LEAVES

ROOT HAIR CELLS INCREASE SURFACE AREA

The increased surface area means that water can be absorbed faster from the soil.

Transpiration is the loss of water vapour from leaves which causes water molecules to be pulled upwards through the roots, stem and leaves.

The water is needed for photosynthesis and to keep plant cells turgid (full) which supports the plant and prevents it from wilting.

WHAT HAPPENS IF A PLANT DOES NOT HAVE ENOUGH WATER?

•The plant wilts as the cells are no longer turgid.

•As cells are not turgid stomata close to prevent further water loss.

•The drooping leaves reduces their surface area which helps to reduce water loss.

•Plants may overheat when they do not have enough water.

•Plants will stay wilted until they receive enough water.