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42 Cards in this Set
- Front
- Back
Adventitious Root
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roots that grow from aboveground parts of a plant, such as stems and leaves
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C3 Plant
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plant that fixes carbon using the Calvin Cycle
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C4 Plant
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plant that fixes carbon using an alternative pathway in which the first detectable product is a four-carbon compound
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Companion Cell
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of plant phloem, cell alongside a sieve tube member that carries out metabolic functions for it
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Cork Cells
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Cells that replace the epidermis of woody stems; part of the bark
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Cortex
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the outer layer of ground tissue in roots and stems of plants
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Dermal Tissue System
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The outer protective layer of dermal tissues of vascular plants
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Epidermis
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outer most layer of tissue, consisting of several layers of cells
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Fibrous Root System
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root system consisting of roots that are about the same size
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Heartwood
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dark, nonconducting wood in the center of a log
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Herbaceous Stem
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flexible, usually green (nonwoody) stem
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Lateral Bud
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bud located at a node of a stem that grows into a branch of the stem
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Internode
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area between two nodes of a plant stem
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Mesophyll
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ground tissue of a leaf
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node
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point on a plant stem from which leaves grow
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Palisade Layer
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of a leaf, cell layer of the mesophyll consisting of one or more rows of closely packed, columnar ground tissue
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Petiole
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slender stalk the supports the blade of a leaf
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Pith
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of plant stems, the inner layers of ground tissue
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Pressure-Flow Model
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the model of translocation in which pressure created by water entering a sieve tube by osmosis pushes a sugar solution from a source to a sink
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Root Hair
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extension of a epidermal cell near the root tip that aids in the absorption of water
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Sapwood
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the lighter wood in a tree trunk, containing xylem cells that conduct water
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Sieve Plate
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cluster of pores at the end of a sieve tube member
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Sieve Tube
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in phloem, a continuous strand of sieve tube members stacked end to end
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Sieve Tube Member
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type of conducting cell in the phloem of plants
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Sink
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part of a plant to which sugar is delivered
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Spongy Layer
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of a leaf, the lower portion of the mesophyll, consisting of loosely packed, spherical ground tissue cells
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Taproot System
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root system with a large central root and smaller lateral roots
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Tension-Cohesion Theory
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theory that water moves up a plant because of its cohesive properties and because of tension created by the loss of water from leaves through transpiration
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Terminal Bud
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bud that grows at the tip of the stem
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Tracheid
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a narrow, thick-walled cell of the xylem
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Transpiration
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loss of water from a plant through its stomata
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Vascular Bundle
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cluster of vascular tissue in a leaf or a herbaceous stem that contains both xylem and phloem
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Vascular Tissue System
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of plants, system that conducts water, mineral nutrients, and organic molecules made by photosynthesis
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Vessel
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tube of xylem tissue from a series of vessel elements stacked end to end
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Vessel Element
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in plant vascular tissue, xylem cell the conducts water
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Woody Stems
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Stiff, usually nongreen stems that contain layers of wood, as opposed to herbaceous stems
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Ground Tissue System
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all the tissues of a vascular plant except the dermal tissue and vascular tissue
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Lenticel
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area of loosely-packed cork cells on a woody stem that enables gas exchange
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Root Cap
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protective layer covering the tip of a root
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Source
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part of a plant the provides sugar for other parts of the plant
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Translocation
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movement of sugar within the a plant from a source to a sink
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leaflet
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individual segment of a compound leaf
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