palisade mesophyll		The tissue that transports water and dissolved minerals up a plant.
dicotyledon		A plant that has two seed halves.
lysis		When a plant cell is held in shape by the water pressure in the vacuole.
stoma		Bursting of an animal cell due to water gain.
phloem		Two cells that control the opening and closing of a stoma.
crenation		A central hollow cavity allowing passage of water in the xylem.
plasmolysis		The tissue that transports dissolved food substances up and down the plant.
cuticle		Part of a leaf that carries water to the cells.
wilting		Shrinking of animal cells due to loss of water.
guard cells		Large rectangular cells in the leaf where most photosynthesis takes place.
chlorophyll		The movement of sugars and other food materials through the phloem.
lumen		The movement of water from an area of high concentration to an area of low concentration through a partially permeable membrane.
transpiration		A small pore on the underside of a leaf.
translocation		The green pigment produced by plants that traps light energy.
xylem		The waxy layer on the top surface of leaves that reduces water loss.
turgid		When a plant cell loses shape due to a drop in water pressure in the vacuole.
vein		The shrinking of plant cells that have lost water and the cell membrane has come away from the cell wall.
osmosis		The loss of water from plant leaves.
flaccid		What happens to a plant that does not take in enough water.