Most flexible, thin-walled cells found throughout a plant.

Plant cells that often are elongated and occur in long stands or cylinders that provide support for the surrounding cells.

Plant cells that lack cytoplasm and other living components when they mature, but their thick rigid cell walls remain.

Regions of rapidly dividing cells.

A thin cylinder of meristematic tissue that can run the entire length of roots and stems.

Produces cells that develop tough cell walls.

The layer of cells that makes up the out covering on a plant is dermal tissue.

The two cells that form a stoma.

The water-carrying vascular tissue composed of specialized cells vessel elements and tracheids.

Tubular cells that are stacked end-to-end, forming strands of xylem.

Long, cylindrical cells with pitted ends.

Contains cytoplasm but lacks a nucleus and ribosomes when it is mature.

Consist of parenchyma, collenchyma,and nd sclerenchyma cells and have diverse functions.

Some root epidermal cells produce root hairs that absorb water and dissolved minerals.

At the inner boundary of the cortex is a layer of cells.

The layer of cells directly next to the endodermis toward the center of the root.

The blade might be attached to the stem by a stalk.

They contain many chloroplasts and make up the tissue.

consisting of irregularly-shaped, loosely packed cells with spaces surrounding them.

Water evaporates from the inside of a leaf to the outside through stomata in a process.

One of the first plant hormones to be identified.

The only known gaseous hormone.

Produced in rapidly dividing cells.

A plant response that causes movement that is not dependent on the direction.

A plants growth response to an external stimulus.

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Chapter 22 Vocab

Term	Definition
Parenchyma cell	Most flexible, thin-walled cells found throughout a plant.
Collenchyma cell	Plant cells that often are elongated and occur in long stands or cylinders that provide support for the surrounding cells.
Sclerenchyma cell	Plant cells that lack cytoplasm and other living components when they mature, but their thick rigid cell walls remain.
Meristem	Regions of rapidly dividing cells.
Vascular cambium	A thin cylinder of meristematic tissue that can run the entire length of roots and stems.
Cork cambium	Produces cells that develop tough cell walls.
Epidermis	The layer of cells that makes up the out covering on a plant is dermal tissue.
Guard cell	The two cells that form a stoma.
Xylem	The water-carrying vascular tissue composed of specialized cells vessel elements and tracheids.
Vessel element	Tubular cells that are stacked end-to-end, forming strands of xylem.
Tracheid	Long, cylindrical cells with pitted ends.
Phloem	The main food-carrying tissue.
Sieve tube member	Contains cytoplasm but lacks a nucleus and ribosomes when it is mature.
Companion cell	Each with a nucleus.
Ground tissue	Consist of parenchyma, collenchyma,and nd sclerenchyma cells and have diverse functions.
Root cap	The tip of a root is covered.
Cortex	Some root epidermal cells produce root hairs that absorb water and dissolved minerals.
Endodermis	At the inner boundary of the cortex is a layer of cells.
Pericycle	The layer of cells directly next to the endodermis toward the center of the root.
Petiole	The blade might be attached to the stem by a stalk.
Palisade mesophyll	They contain many chloroplasts and make up the tissue.
Spongy mesophyll	consisting of irregularly-shaped, loosely packed cells with spaces surrounding them.
Transpiration	Water evaporates from the inside of a leaf to the outside through stomata in a process.
Auxin	One of the first plant hormones to be identified.
Gibberellins	The group of plant hormones.
Ethylene	The only known gaseous hormone.
Cytokinin	Produced in rapidly dividing cells.
Nastic response	A plant response that causes movement that is not dependent on the direction.
Tropism	A plants growth response to an external stimulus.

Created by: Alayna Long

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