U 2 - levels of organization (P1) Flashcards
Def of levels of organization
levels of inc. complexity
flow diagram of levels of org.
cells —- tissues —- organelles —- organs —– organ systems
def of organelles
specialised structures performing certain tasks within the cell
def of tissue
group of cells working together to perform a particular function
def of organs
group of tissues working together to perform a particular function
def of organ system
group of several organs working together to perform a particular function
2 types of tissues
animal t
plant t
5 types of plant tissues
xylem vessel
ploem vessel
palisade tissue
epidermis lines
root hair cells
2 functions of root hair cell
inc. surface area for intake of water
absorbs water and inorganic salts in a form of ions from the soil water
def of ions
form of inorganic salts absorbed by the soil water by plants
function of xylem
supports the plant and transports water and inorganic salts
adaptations of xylem
has lignin lined in walls
hollow end to end
dead cells
what is transverse section
cut across
what is longitudinal section
cut along
what does transverse section of stem show
how xylem vessel fits together
