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epidermis
outermost tissue in all young and nonwoody plant organs
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cell wall
outermost boundary of a plant cell,rigid, gives support
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abaxial
lower surface of a leaf
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accessory pigment
absorb energy that chlorophyll a does not absorb
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polysaccharide cellulose
make up most of plant cell walls
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lignin
make up secondary cell walls
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middle lamella
- an intercellular glue composed of pectins, that holds the cell walls of neighboring cells together. The middle lamella is most pronounced when the corners of plant cells adjoin
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chloroplasts
- spherical bright green discs that appear to hug the interior side of the cell wall
- sites of photosynthesis
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nucleus
- a perfect sphere and clearly outlined by the nuclear envelope, a double membrane layer. It is larger than a chloroplast, and it may be adjacent to the wall or somewhere in the center of the cell
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central vacuole
fluid filled sac, storage of various substances
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tonoplast
vacuoler membrane
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plastids
- any of a class of small organelles in the cytoplasm of plant cells, containing pigment or food
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elaioplasts
plastid that accumulates lipids
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amyoplasts
plastid that accumulates startch grains
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chromoplasts
contain the pigments of yellow, orange, or red
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plasmodesmata
interconnect plant cells and allow for transport of nutrients of water from cell to cell
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raphides
needle like crystals in cell wall
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druse
star shaped crystal of calcium oxalate
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cystolithe
plant crystal (cell rock)
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dermal tissue
outermost layer in a plant
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ground tissue
make up bulk of nonwoody plant organs
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parenchyma
perform many different functions, 
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collenchyma
primary support tissue in young plant organs,elongated cells
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cutin
wax like material that prevents water loss from plants
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stomata
- allow for the exchange of gases
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gaurd cells
regulate stomata, located on both sides of stomata
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periderm
replaces the epidermis on plants that have secondary growth
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trichomes
hair like structures that occur in the epidermis of many plants
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xylem
- conduct water and minerals upward from the root
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phloem
- conducts organic matter through out the plant
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seive tube members
cells involved in trasporting organin materials in the phloem
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sieve plates
pores that connect the seive tube members
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companion cell
- functions in loading orunloading organic material into the sieve
‐tube member before and after transport
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