plant structure and function
TRANSCRIPT
Plant structure and functionPresented by : Claire Gui
tissues leaves
vascular tissue system
structure and fuction
ground tissue system
dermal tissue system
stemsroots
woody stemsnonwoody stems
structure & function
What are tissues?• plant's body is made of tis
sues that form organs• vascular plants• 3 types of tissue systems• tissue contains one or mo
re kinds of cells to perform particular functions
structure & function
Dermal tissue system• Structure• the tissue covers outside of
a plant's body• nonwoody parts of the plant form epidermis• made up of a single layer of
flat cells
structure & function
Dermal tissue system• Function• extensions of the epidermal cells on leaves and stems help to slow water loss on root tips help increase water absorption• gas exchange• absorption of mineral nutrients
structure & function
Ground tissue system• Structure• makes up much of the inside of the plants• consists of thin-walled cells remain alive and keep their nucleus after they mat
ure• some thick-walled cells strengthen the stem
structure & function
Ground tissue system• Function• depends on where it is located• leavespacked with chloroplasts specialized for photosynthes
is• stems and rootsstorage of water,sugar and starch• surrounds and supports vascular tissue
structure & function
Vascular tissue system• two kinds of vascular tissues xylem and phloem• contain strands of cells that are stacked end to en
d • carry fluids and dissolved substances
structure & function
Vascular tissue system• Xylem• thick-walled cells• conduct water and mineral nutrients• from roots through its stems to its leaves• lose their cell membranes, nucleus, and cytoplas
m before they can conduct water
structure & function
Vascular tissue system• Phloem• contain cells conduct sugars and other nutrient
s• cell membrane,cell wall and cytopl
asm• cells either lack organelles or have modified organelles
structure & function
Roots• plants are anchored to the spot where they grow b
y roots• roots have characteristic external and internal stru
ctures
structure & function
Stems• Function• support the leaves and house the vascular tissue• transport substances between the roots and leave
s• store water• store nutrient
structure & function
Stems
•non woody stems•woody stems
•What Is The Difference?
structure & function
Stems• non woody stems flexible and usually green buttercup ,corn
• woody stems stiff and non green pines,roses
structure & function
Leaves• primary photosynthetic organs of plants
structure & function
flattened portion blade
blade can be divided into two or more sections leaflet
–Thank you for listening!