Xylem Flashcards
what are the elements of a vascular bundle from a stem corn
Xylem (tracheary elements, tracheids, vessel elements), fibers and parenchyma
what is the function of xylem in a vascular bundle from stem corn
conduction of water and nutrients, support and storage and maintenance
what is the function of parenchyma
storage
what is the function of fibers
support, sometimes storage
what is the function of tracheary elements, tracheids and vessel elements
conduction of water and minerals
where are perforations found and what are they
perforations are found in wide and narrow vessel elements and they are the large or small spaces at the top and bottom of the vessels
what are tracheids
tracheids are narrow and they conduct water and minerals
what are fibers
fibers are the thinnest and and they’re used for support and sometimes storage
what are angiosperms
wide vessel elements, narrow vessel elements, tracheid and fibers
what are gymnosperms
tracheids and fibers
what are the three types of tracheary arrangements
annular, helical and double helical arrangement
when can tracheary elements function
they must be dead at maturity to function
how does water move between tracheids
water moves only through pits
how does water move between vessel elements
water moves from one vessel to the next through perforations and pits
what are hydathode characteristics
pore, guard cell, epithem, xylem, chlorenchyma, intercellular space, stomatal chamber
