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Bio CH19

Biology CH19 The Importance of Leaves

blade the thin, flat part of a leaf
epidermis the outer layers of cells of a plant
guard cell green cells that change the size of the stomata in a leaf
midrib the main vein of a leaf
palisade layer the layer of long, green cells below the upper epidermis of a leaf
spongy layer the layer of round, green cells directly below the palisade layer of a leaf
stoma a small pore or opening in the lower epidermis of a leaf
transpiration the process of water passing out through the stomata of leaves
wilting when a plant loses water faster than it can be replaced