xylem vs phloem

xylem

water is taken up the plant from the roots to the leaves for photosynthesis or transpiration…minerals transported through water

phloem

assimilates taken from the leaves and moved up and down the plant to any part which needs it for growth or storage…source to sink

made of

xylem=dead cells…phloem=living cells

cell wall thickness

xylem=thick…phloem=thin

cell wall material

xylem=lignin…phloem=cellulose

cell wall permeability

xylem=impermeable…phloem=permeable

cross walls

xylem=mostly absent, perforated…phloem=perforated known as sieve plates

cytoplasm

xylem=none…phloem=cells lined with cellulose

carried to

xylem=leaves…phloem=growing parts and storage organs

direction of flow

xylem=upwards…phloem=up and down

tissue also has

xylem=fibres for support…phloem=companion cells for sieve tube elements