Plant Tissues and the Multicellular Plant Body Flashcards
what are the shoot system
-flower
-leaf
-fruit
-stem
root system
-roots
what is the function of a flower
-helps in reproduction
function of a leaf
performs photosynthesis
function of a fruit
protects the seeds
function of stem
supports the plant
function of roots
absorbs water and minerals
2 organ systems of plant
shoot system
root system
the underground part of a plant which supports the shoot system
root system
• is comprised of the primary root (main root) which branches into secondary roots and tertiary roots
root system
function of roots
-absorbs water and minerals
-anchorage of plants to the ground
-storage of food reserve
is above ground
shoot system
function of stems
• support and elevation of leaves, fruits, and flowers
• transport absorbed water and minerals to different parts of the plant
• transport the products of photosynthesis
the shoot is comprised of the
vegetative shoot
reproductive shoot
vegetative shoot’s function
non-reproductive (leaves, stem)
cells divide
meristematic
types of meristematic tissue
apical meristems
intercalary meristems
lateral meristems
cells do not divide
permanent
permanent comprised of
simple and complex
simple
ground
complex
vascular
complex comprised of
xylem and phloem
simple comprised of
-parenchyma
-collenchyma
-sclerenchyma
located at the tips of stems and roots
apical meristems
enable a plant to extend in length
apical meristems
facilitate growth in thickness or girth in a maturing plant
lateral meristems
occur only in monocots at the bases of leaf blades and at nodes
intercalary meristems
enables the monocot leaf blade to increase in length from the leaf base
intercalary meristems
plants use lateral meristems to
to grow in diameter or thickness as part of secondary growth.
2 types of lateral meristematic tissue
- vascular cambium
- cork cambium
is the main route by which the stems and roots grow.
vascular cambium
xylem toward
outside
phloem towards
inside
is present in mostly woody and some herbaceous plants and gives rise to the cork or bark layer on the outside of the stem and secondary growth in the epidermis of roots. This is accomplished by replacing the epidermal cells with the periderm which consists of three layers.
cork cambium
epidermal cells with the periderm which consists of three layers.
- phelloderm
- phellogen
- phellem
is the innermost layer made of living parenchymal cells.
phelloderm
On top of that layer is the cork cambium itself or the _______ that gives rise to the periderm.
phellogen
The outermost layer is the cork or _______ (bark) which is made of dead, air-filled cork cells.
phellem
Meristems produce cells that quickly differentiate or specialize into the three main types:
-dermal tissue
-vascular tissue
-ground tissue
covers and protects the plant.
dermal tissue
transports water, minerals, and sugars to different parts of the plant.
vascular tissue
serves as a site for photosynthesis, provides a supporting matrix for the vascular tissue, and helps to store water and sugars.
ground tissue
The dermal tissue system is consists of
epidermis
generally a single layer of cells
epidermis
leaves, the epidermis
secretes a coating, the _____, that helps the plant retain water and contain pores,
cuticle
the ____ whose guard
cells regulate gas exchange
between the plant and the environment by controlling the size of the stomata openings
stomata
dermal tissues is consist of
- epidermis
-periderm
also called bark, replaces the epidermis in plants that undergo secondary growth.
periderm
is multilayered as opposed to the single-layered
epidermis. It consists of cork cells (phellem), phelloderm, and phellogen (cork cambium).
periderm
protects the plant from pathogens, injury, prevents excessive water loss, and insulates the plant.
periderm
vascular tissues
xylem and phloem
transports water and nutrients from the roots to different parts of the plant.
xylem tissue
xylem tissue includes 3 different cell types
- vessel elements
- tracheids
- xylem parenchyma
transports organic compounds from the site of photosynthesis to other parts of the plant,
phloem tissue
phloem tissue consists of 4 different cell types
- sieve cells (conducts photosynthesis)
- companion cells
- phloem parenchyma
- phloem fibers
ground tissues,,
synthesize organic compounds and provide support to the plant.
ground tissue is made up of 3 types
-parenchyma
-collenchyma
-sclerenchyma