Advertisement Upgrade to remove ads

petiole

attaches blade of leaf to stem

no petiole

sessile (grasses)

compound leaf

has many leaflets (blades) coming of a single petiole

node

area which petiole of leaf grows off the stem

phototropism

petiole's ability to twist to light

venation

pattern of veins within leaf

midrib

main vein down center (if present)

veins purpose

pipeline for transporting sap/water

epidermal

protects and covers. it is thin and covered by waxy cuticle (holds in water)

cork (bark)

protection for woody plants

parenchyma

makes and stores food

support

thick cells and fiber

vascualr tissue

tube like cells in veins

xylem

move water/minerals upward from roots

phloem

move sap/food downward from leaves

meristematic tissue

growing tissue

longitudinal growth

apicable meristem at root/stem tips

cambium

growth in diameter

vascular

new xylem and phloem

epidermis

covered by cuticle

stomata

pores on bottom; permits air to enter/leave; transpiration

transpiration

excess water leaves

leaf hairs

slow air flow /water loss

mesophyll

parenchyma layer

palisade

(upper) colums like cells; site of most photosynthesis-chlorophyll

spongy layer

(lower) large air spaces between cells; provides air for photosynthesis

nucleus

genes

cytoplasm

organelles

cell wall

cellulose and lignin

large vacuole

storage

chloroplasts

chlorophyll

photosynthesis

putting together of light; process whereby a green plant is able to capture radiant energy of sunlight and convert it into the chemical energy of food.

green

chlorophyll pigment in chloroplasts

process of photosynthesis

water enter chloroplast in leaf and is exposed to sunlight; suns energy split to the hydrogens off the water and releases oxygen as byproduct; water is converted into 2 other compounds in via stomata and air apaces of spongy layer; result is glucose/sugar

Why make glucose?

provide energy for plant cells to live and work; extra glucose is linked together into starch and stored in the plant which we eat

cellular respiration

glucose is burned for energy

Why leaves fall?

shortened days in fall; lower temperature; abcission layer; enzymes release at base of petiole; cellulose weakened

cork

leaf scar

Water and Wilting

influenced by temperature; water available in soil; windspeed across leaves (hairs present); air humidity

turgor

water pressure

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set