Leaf definitions

alternate
pattern of leaf attachment
blade
flat portion of leaf
compound
a leaf with two or more leaflets (leaf classification).
guard cells
cells regulating flow through the stomata.
leaf
the photosynthetic (food manufacturing) organs that produce carbohydrates to provide energy for the plant to live and grow
leaflet
resembles a leaf but is not borne on a petiole (leaf classification).
margin
edges of the leaf
needles
long, thin, linear leaves.
opposite
pattern of leaf attachment
petiole
stalk-like structure that attaches the blade to the stem.
photosynthesis
process using light energy to convert CO2 and H2O to carbohydrates.
respiration
process by which carbohydrates are converted into cellular energy.
simple
a single leaf (leaf classification).
stipule
outgrowths on either side of the petiole.
stomata
openings into the leaf that allow gas exchange and transpiration.
transpiration
loss of water vapor through the leaf stomata that helps to regulate leaf temperature and helps to carry water up the plant from the roots
vascular bundle
structure of phloem, xylem and cambium that transport water, nutrients, and sugars to and from the leaf, and enter the leaf through the petiole.
whorled
pattern of leaf attachment