complex tissue made up of tracheids and vessel elements, parenchyma and sclerenchyma
The two chief funcitonal cells of xylem are the tracheids and vessel elements
both are dead at maturity and have elongated cells whose secondary cell walls have holes (pits)
different in terms of plant
xylem function
transport of water and minerals up plant
root-->stem-->leaf
xylem
continuous through whole plant
phloem characteristics
vascular and complex
sieve tube cells/ elements
companion/ albuminous cells
two functional cells are the sieve tube elements and the companion cells
also has sclerenchyma
sieve: elongated but alive cells; lost most organelles but still alive; ends contain sieve poles
companion cells: specialized parenchyma cell alive at maturity and used for loading and unloading of organic material into and out of sieve tube elements
phloem function
transport of organic molecules up and down and across in all directions