plant and animal tissues Flashcards
tissue
groups of cells that are the exact same, perform the
same function and occur in the same place in
large numbers
types permanent tissues
epidermal, vascular and ground tissues
epidermal tissues
cover the plant
vascular tissues
transport water and nutrients
ground tissues
fill the space between the epidermal and vascular tissues
types of epidermal tissue
guard cells and root hairs
structure of epidermal tissue
single layer tightly packed thin-walled cell
cover with waxy layer
waxy layer covering epidermal tissue and function
cuticle protects plant and prevents too much water loss
function of epidermal tissue
covers and protects plant
controls movement of water out of plant
roots absorb water
types of ground tissues
parenchyma, collenchyma, chlorenchyma and sclerenchyma
function of parenchyma
stores food and water
allows gases and water to move through plant
structure of parenchyma
large vacuoles
loosely packed
large intercellular spaces
thin cellulose cell walls
a tissue that that performs photosynthesis
chlorenchyma
the function of chlorenchyma
stores starch
makes up mesophyll of leaf
allows gases and water to past between cells
structure of chlorenchyma
parenchyma tissues with chloroplast
irregular shape in leaf mesophyll
large intercellular space in spongy parenchyma
small intercellular space in palisade parenchyma
what provides mechanical support for plant
and provides strengthening tissue
collenchyma
collenchyma structure
cell walls are unevenly thickened
thickness mainly occurs on the corners off cell walls
types vascular tissues
xylem, phloem
what is xylem
it contains non living material
what is regarded a dead tissue
xylem
what does xylem mainly consist of
xylem vessels and tracheids
basic structure of xylem vessels
a series of elongated cells (connected end to end)
doesn’t contain cytoplasm
perforated cross walls
callouses walls are thickened by lignin
uneven thickening
why do xylem vessels have uneven thickening
for additional strength and support
