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25 terms

Laboratory 20 Plants 2 of 2

Typical Root Leaves Stem Types and Cross Section Tissue ID
STUDY
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Primary Root
first root that grows from plant seed when it germinates
Secondary Root
the roots that branch off of the primary root
Radicle
An embryonic root of a plant.
Taproot System
A root system common to eudicots, consisting of one large, vertical root (the taproot) that produces many smaller lateral, or branch, roots.
Fibrous Root System
A root system common to monocots consisting of a mat of thin roots spreading out below the soil surface.
Vascular Cylinder
central region of a root that includes the vascular tissue-xylem and phloem
Monocot Stele
Identify which root stele
Dicot Stele
Identify which root stele
Cortex
spongy layer of ground tissue just inside the epidermis of a root or stem
Epidermis
an outer layer of cells designed to provide protection
Xylem
the woody part of plants: the supporting and water-conducting tissue, consisting primarily of tracheids and vessels
Phloem
vascular tissue responsible for the transport of nutrients and the carbohydrates produced by photosynthesis
Endodermis
single layer of cells that form a waterproof seal around a root's vascular tissue; controls the flow of water and dissolved ions into the root
Casparian Strip
A water-impermeable ring of wax in the endodermal cells of plants that blocks the passive flow of water and solutes into the stele by way of cell walls.
Suberin
Fatty material found in the cell walls of cork tissue and in the Casparian strip of the endodermis
Pericycle
A layer of cells just inside the endodermis of a root that may become meristematic and begin dividing again.
Cuticle
A waxy covering on the surface of stems and leaves that acts as an adaptation to prevent desiccation in terrestrial plants.
Mesophyll
The ground tissue of a leaf, sandwiched between the upper and lower epidermis and specialized for photosynthesis.
Vascular Bundle
plant stem/leaf structure that contains xylem and phloem tissue.
Vein
A cluster of vascular tissue in leaves
Stomata
the small openings on the undersides of most leaves through which oxygen and carbon dioxide can move
Guard Cells
The two cells that flank the stomatal pore and regulate the opening and closing of the pore.
Woody Dicot Stem
Identify this Cross Section
Herbaceous Dicot Stem
Identify this Cross Section
Herbaceous Monocot Stem
Identify this Cross Section

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