Cell Types and Tissues Flashcards
cell differentiation
process of changing from one trypw of cell to another type of cell
regulated process
Meristematic cells
undifferentiated cells
only cells that perform mitosis
Types of meristematic tissues
apical
intercalary
Proambium
protoderm
vasc cambium
cork cambium
pericycle
Apical Meristem
root and chute elongation
top = newest part
intercalary mersitem
monocots, found at nodes (bamboo)
protoderm
epidermal cells
cutin
cutin
waterproof molecule in protoderm
vascular cambium
makes secondary xylem and phloem
wood in plant
in older woody plants
WHat makes up wood in plant
vasc ca,bium
Procambium
vasc cambium
primary xylem and phloem
pericycle
secondary roots
cork cambium
bark
Periderm
Sucrin- waterproof
Sucrin
waterproof molecule in cells
does parenchyma have a secondary cell wall
no
the enchymas
comes from ground meristem
parenchyma
leaves petals fruits seeds
most common
NO SECONDARY CELL WALL
alive at maturity
can do cell division
storage cells
wound healing
Pith
where find parenchyma cells
Vasc bundles of xylem and phloem
where pathogens attack
chlorenchyma
Parenchyma cells that perform photo
collenchyma
Thickened corners
celery strings
increased deposits of cell wall materials
living elongated cells
Celery cell type
collenchyma
Sclerenchyma
very thick secondary cell wall w lignin
usually dead
x expand w turgor pressure
Lignin
waterproof molecule in sclerenechyma
Fibers (sclerenchyma cells)
long cells, conducting sclerenchyma stem roots tree trunks
sclerids
shorter walnut shells, dies after secondary cell wall is formed
Epidermal Cells
make up epidermis tissue
outer most later of plant
(skin)
epidermis tissue
protects plants is transparent
Periderm
Cork cells form periderm
bark
Cork Cambium + Layers of cork cells =
periderm
Xylem
tissue that conducts water and minerals
Where is primary xylem located
procambium
where is secondary xylem located
vasc cambium
are treacheids alive or dead at maturity
dead
tracheids
cells that transport water and minerals, diff from parenchyma cells
what does a tracheid cell look like
elongated thick cell walls
inside hollow = water movement
pits in cell wall so fluid can move from one cell to the next
vessel elements
conduct water and minerals
dead at maturity
shorter and wider than tracheids
fully open ho;es where two cells meet = less friction
stack of vessel elements
stack
Phloem
Vasc tissue that conducts sugar
made up of parenchyma fibers
2 types of phloem cells
Sieve tube members
compainion cells
Sieve tube members
Phloem cell that transports sugar
elongated cell w pore @ end of wall- sieve plates
NO nucleus
Sieve plate
hole at end of sieve tube member wall
DOes every sieve tube member have a companion cell
yes
Do sieve tube members have a nucleus
no
Compainion cells
next to sieve tube elements
sends message to manage sieve tube elements
Glandular cells
Secretory cells
Formed from parenchyma cells
More ER and dictyosomes
Lots of sugars and minerals
