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Plant Parts and Functions

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					Plant Parts and Functions

By :

Alisa Kowalski Jessi Spry Alyson Wilson

Parts of The Plant

Roots
2 Types of Root Systems

Taproot System
Primary root grows down from the stem with some small secondary roots forming Examples: Carrots & Turnips

Roots
Fibrous System
Small lateral roots that spread out just below the soil’s surface
Examples: Corn & Beans

Parts of the Root
Epidermis
Outermost layer of cells

Cortex
Tissue inside epidermis that stores starch and other substances necessary for the growth of the root

Parts of the Root
Root Cap
Provides protection for the root tip

Root Hairs
Site of absorption

Vascular Tissue
Within cortex, contains cells that transport water, nutrients, and minerals to all parts of the plant

Root Functions
Roots have 4 primary functions
1. Absorption of water and nutrients

(performed by root hairs) 2. Transportation of water and nutrients to stem 3. Anchor plant to maintain stability 4. Store food and water

Leaves
Blade
Main body of leaf

Petiole
Attaches blade to stem

Midrib
Large central vein

Leaves
Apex
Tip of leaf

Base
Attaches to petiole, if petiole is absent attaches directly to stem

Margin
Edge of leaf

Leaves
Epidermis
Responsible for gas and water exchange

Stomata
Opening in epidermis where gas and water exchange

Mesophyll
Middle layer of leaf where photosynthesis occurs

Important Functions of Leaves
Photosynthesis
Process that plants use to produce their food 6CO2 + 6H2OC6H1206 + 6 O2

Transpiration
Loss of water and exchange of carbon dioxide

Parts of the Stem
Node
Areas where side branches and leaves develop from

Internode
Area between nodes

Lenticles
Small holes located in the stem (breathing pores)

Functions of the Stem
1. Transports water and nutrients from roots to leaves

2. Supports leaves, fruits and flowers

3. Food Storage

Fruit Classification
Aggregate
Develop from a single flower with many ovaries

Examples: Strawberries & Tulips

Fruit Classification
Multiple
Fruit develops from a group of tightly clustered flowers

Examples: Pineapples & Figs

Fruit Classification
Simple
Develop from a single ovary

Examples: Cherries & Tomatoes

Fruit’s Function
Site of seed production

Flower Parts
Pistil
Female part of plant Consists of:
•Stigma

•Style •Ovary

Flower Parts
Stamen
Male reproductive organ Consists of: •Anther •Stamen

Flower Parts
Petals
Highly colored part of the flower, may contain perfume and/or nectar glands

Sepals
Small green structures on the base of a flower that protect the flower bud

Flower Classification
Complete flower
Has all four male and female parts

Incomplete flower
Perfect flower

Missing one of the four male or female parts Has stamens and pistils Lacking either stamens or pistils

Imperfect flower

Flower Function
Sexual Reproduction is the flowers sole function

Pollination by:
Wind Insects and Birds

Parts of the Seed
Embryo Growing part of seed

Endosperm Tissue that provides nutrition for the developing seed

Cotyledon Food storage tissue

Parts of the Seed
Seedcoat Protective outer covering of the seed

Scutellum

Absorbs the endosperm


				
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posted:4/17/2008
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