Lab 9 Flashcards
dermal tissue system
outer layer of cells, protection
ground tissue system
everything enclosed by epidermis except vascular bundles, support
vascular tissue system
vascular bundles, transport
3 dermal tissue types
epidermis, cork, periderm
epidermis cell types
guard cell, pavement cell, subsidiary cell
cork cell type
cork cells
periderm cell types
cork cambium cells, cork cells
3 ground tissue types
parenchyma, collenchyma, sclerenchyma
parenchyma cell type
parenchyma
collenchyma cell type
collenchyma
sclerenchyma cell types
fiber, sclerid
vascular tissue types
xylem: transport water and nutrients from root
phloem: transport of sugars
xylem cell types
tracheid, vessel element
phloem cell types
sieve cell, companion cell, albuminous cell, sieve tube element
pith
inside vascular bundles
cortex
outside vascular bundles
guard cells protection function
allow gas exchange, limit water loss
trichomes protection function
trap water, some secrete sticky droplets to catch prey
druses
jagged spheres
raphides
needle shaped
what are druses and raphides made from?
crystals of calcium oxalate
collenchyma
unevenly thickened primary cell wall
sclerenchyma
thickened secondary cell wall
collenchyma and sclerenchyma provide
physical support
sclerid/fiber
secondary cell wall contains lignin
parenchyma
thin primary cell wall, support growth by metabolic activity
metaxylem
continuous tubes running longitudinally
pitted secondary walls
protoxylem
hoops or spirals, incomplete secondary walls
annular thickening: hoops
helical thickening: spirals
sieve tube elements
long cells that transport sugars, accompanied by smaller companion cells
