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Chapt 29 Plant Structure and Function
Leaves
14
Biology
10th Grade
01/28/2010

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Term
tendril
Definition
an organ of climbing plants that grows in spiral form and wraps around another body to help support the plant
Term
blade
Definition
the broad, flat portion of a typical leaf
Term
petiole
Definition
the stalk that attaches a leaf to the stem of a plant
Term
simple leaf
Definition
a leaf that has an undivided blade
Term
compound leaf
Definition
a type of leaf in which the blade is divided into leaflets
Term
leaflet
Definition
one segment of a compound leaf
Term
mesophyll
Definition
in leaves, the tissue between epidermal layers, where photosynthesis occurs
Term
palisade mesophyll
Definition
in plants, the layer of vertically elongated cells that contains chloroplasts, that is located beneath the upper epidermis of leaves, and that participates in photosynthesis
Term
spongy mesophyll
Definition
inside a leaf, the tissue that is made up of loosely arranged parenchyma cells that contain chloroplasts and are surrounded by air spaces that promote the diffusion of oxygen, carbon dioxide, and water throughout the leaf
Term
vein
Definition
in plants, a bundle of vascular tissue that transports fluid and nutrients
Term
venation
Definition
the arrangement of veins in a leaf
Term
parallel venation
Definition
a parallel arrangement of veins
Term
net venation
Definition
a nonparallel, branching network of veins that is typical of the leaves of dicots
Term
guard cell
Definition
one of a pair of specialized cells that border a stoma and regulate gas exchange
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