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chap 23
who needs flashcards to be a libraryian?
31
Library Information Skills
Professional
05/10/2011

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Term
epidermal cells
Definition
small covering on a cell
Term
vascular tissue
Definition
forms a transportation system that moves water and nurtrience around the plant.
Term
vessel element
Definition
wider than trachaides. aranged on top of each other like tin cans.
Term
sieve tube elements
Definition
arranged end to end. found in phloem.
Term
compainon cells
Definition
surround sieve tube elements. support phloem.
Term
parenchyma
Definition
cells that have thin cell walls and large centeral vacuoles surrounded by a thin layer of cytoplasm.
Term
collenchyma
Definition
strong flexible cell walls that support larger plants
Term
sclerenchyma
Definition
cells w/ extremly thick rigid cell walls that make ground tissue tough and strong.
Term
meristems
Definition
cluster of tissue that are resposable for the plants continuing growth.
Term
meristematic tissues
Definition
cells that are not specified for function
Term
apical meristem
Definition
group of undeferentiated cells that devied to produce new stems and roots.
Term
differentiation
Definition
cells devlope into mature cells with speclized instrutions
Term
taproot
Definition
long and thick roots
Term
fibrous roots
Definition
no single roots grow longer than the rest
Term
root hairs
Definition
tiny cellular projections fill small area in soil
Term
cortex
Definition
small layer in spongy tissue.
Term
endodermis
Definition
layer extends to another layer of cells
Term
vascular cylinder
Definition
covers roots vascular sub system
Term
root cap
Definition
protects roots as it forces its way through the soil.
Term
casparian strip
Definition
condom around the vascular cylinder.
Term
nodes
Definition
where leaves are attached
Term
internode
Definition
regions between nodes
Term
buds
Definition
undevloped tissues that can produce stems and leaves.
Term
vascular bundles
Definition
monocots- spread out along tissue
dicots-packed tightly around pith
Term
primary groth
Definition
growth at end of plant
Term
secondary growth
Definition
stems increase in length
Term
vascular cambium
Definition
produces thickness in stems
Term
cork cambium
Definition
produce the outer covering of stems
Term
heart wood
Definition
when wood no longer conducts water
Term
sap wood
Definition
active in fluid transport and lighter in color
Term
bark
Definition
includes all of the tissues outside the vascular cambium
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