Plant Structure

Science

the cells at the tips of roots and stems, as they divide, the root and stem lengthen

The Cells At The Tips Of Roots And Stems, As They Divide, The Root And Stem Lengthen.

Apical Meristem

Apical Meristem Simple Definition

an flexible plant cell with unevenly thick walls, it forms supportive tissue in plants

An Flexible Plant Cell With Unevenly Thick Walls, It Forms Supportive Tissue In Plants.

Collenchyma

Collenchyma Simple Definition

a nucleated cell that helps to transport substances through the sieve cells of the phloem

A Nucleated Cell That Helps To Transport Substances Through The Sieve Cells Of The Phloem.

Companion Cell

Companion Cell Simple Definition

meristem tissue that produces the protective outer layer of roots and stems

Meristem Tissue That Produces The Protective Outer Layer Of Roots And Stems.

Cork Cambium

Cork Cambium Simple Definition

the tissue layer under the epidermis, it transports water and minerals

The Tissue Layer Under The Epidermis, It Transports Water And Minerals.

Cortex

Cortex Simple Definition

the outer covering of a plant or animal

The Outer Covering Of A Plant Or Animal.

Dermal Tissue

Dermal Tissue Simple Definition

the inner layer of the cortex, it encloses the vascular tissue

The Inner Layer Of The Cortex, It Encloses The Vascular Tissue.

Endodermis

Endodermis Simple Definition

the growth of a new plant from a seed

The Growth Of A New Plant From A Seed.

Germination

Germination Simple Definition

the tissue that makes up the majority of a plant, it consists of the parenchyma, collenchyma and sclerenchyma

The Tissue That Makes Up The Majority Of A Plant, It Consists Of The Parenchyma, Collenchyma And Sclerenchyma.

Ground Tissue

Ground Tissue Simple Definition

one of a pair of cells that open and close plant stoma, to control gas exchange

One Of A Pair Of Cells That Open And Close Plant Stoma, To Control Gas Exchange.

Guard Cell

Guard Cell Simple Definition

the older wood at the center of a tree trunk, it no longer conducts water

The Older Wood At The Center Of A Tree Trunk, It No Longer Conducts Water.

Heartwood

Heartwood Simple Definition

the thin, flat part of a leaf

The Thin, Flat Part Of A Leaf.

Leaf Blade

Leaf Blade Simple Definition

a region of unspecialized cells, which divide to form different types of cells as a plant grows

A Region Of Unspecialized Cells, Which Divide To Form Different Types Of Cells As A Plant Grows.

Meristem

Meristem Simple Definition

plant movement independent of the direction of the stimulus

Plant Movement Independent Of The Direction Of The Stimulus.

Nastic Movement

Nastic Movement Simple Definition

the layer of cells just under the leaf epidermis where most photosynthesis takes place

The Layer Of Cells Just Under The Leaf Epidermis Where Most Photosynthesis Takes Place.

Palisade Mesophyll

Palisade Mesophyll Simple Definition

spherical, thin-walled cell with a large central vacuole, the most common plant cell

Spherical, Thin-walled Cell With A Large Central Vacuole, The Most Common Plant Cell.

Parenchyma Cell

Parenchyma Cell Simple Definition

the stalk connecting a leaf blade to the plant stem

The Stalk Connecting A Leaf Blade To The Plant Stem.

Petiole

Petiole Simple Definition

the vascular tissue that transports food in plants

The Vascular Tissue That Transports Food In Plants.

Phloem

Phloem Simple Definition

the storage tissue at the center of vascular plant stems

The Storage Tissue At The Center Of Vascular Plant Stems.

Pith

Pith Simple Definition

the outermost protective layer of a plant

The Outermost Protective Layer Of A Plant.

Plant Epidermis

Plant Epidermis Simple Definition

growth that occurs at the tips of the stems and roots of a plant

Growth That Occurs At The Tips Of The Stems And Roots Of A Plant.

Primary Growth

Primary Growth Simple Definition

the tough cell layer that protects root tips as they grow

The Tough Cell Layer That Protects Root Tips As They Grow.

Root Cap

Root Cap Simple Definition

a hairlike growth that increases a root’s surface area for water and mineral absorption

A Hairlike Growth That Increases A Root’s Surface Area For Water And Mineral Absorption.

Root Hair

Root Hair Simple Definition

the secondary xylem layer around the herartwood, it transports fluids

The Secondary Xylem Layer Around The Herartwood, It Transports Fluids.

Sapwood

Sapwood Simple Definition

plant cells with thick, rigid cell walls that provide support

Plant Cells With Thick, Rigid Cell Walls That Provide Support.

Sclerenchyma

Sclerenchyma Simple Definition

plant growth that thickens stems and roots

Plant Growth That Thickens Stems And Roots.

Secondary Growth

Secondary Growth Simple Definition

a phloem cell arranged end to end to form a sieve tube

A Phloem Cell Arranged End To End To Form A Sieve Tube.

Sieve Tube Element

Sieve Tube Element Simple Definition

the layer of loose tissue and air spaces under a leaf’s palisade mesophyll layer

The Layer Of Loose Tissue And Air Spaces Under A Leaf’s Palisade Mesophyll Layer.

Spongy Mesophyll

Spongy Mesophyll Simple Definition

the small openings on a plant leaf that allows oxygen and carbon dioxide in and out

The Small Openings On A Plant Leaf That Allows Oxygen And Carbon Dioxide In And Out.

Stomata

Stomata Simple Definition

a hollow xylem cell with thick walls that transports water

A Hollow Xylem Cell With Thick Walls That Transports Water.

Tracheid

Tracheid Simple Definition

the loss of water vapor through the stomata in a plant’s leaves

The Loss Of Water Vapor Through The Stomata In A Plant’s Leaves.

Transpiration

Transpiration Simple Definition

lateral meristem tissue that produces xylem and phloem cells, used to thicken roots and stems

Lateral Meristem Tissue That Produces Xylem And Phloem Cells, Used To Thicken Roots And Stems.

Vascular Cambium

Vascular Cambium Simple Definition

the center of a root or stem that contains the phloem and xylem

The Center Of A Root Or Stem That Contains The Phloem And Xylem.

Vascular Cylinder

Vascular Cylinder Simple Definition

a hollow, tubular cell that forms xylem vessels, which carry water and minerals

A Hollow, Tubular Cell That Forms Xylem Vessels, Which Carry Water And Minerals.

Vessel Element

Vessel Element Simple Definition

plant tissue that moves water and nutrients up from the roots

Plant Tissue That Moves Water And Nutrients Up From The Roots.

Xylem

Xylem Simple Definition

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