2014plant parts & functions

8/10/2019 2014plant Parts & Functions

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Plant Parts and

Functions By :

Alisa KowalskiJessi Spry

Alyson Wilson


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Parts of The Plant


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Roots2 Types of Root Systems

Taproot System

Primary root grows down

from the stem with some

small secondary roots

forming

Examples: Carrots & Turnips


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Roots

Fibrous System

Small lateral roots that

spread out just below the

soils surface

Examples: Corn & Beans


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Parts of the Root

Epidermis

Cortex

Outermost layer of cells

Tissue inside epidermis that

stores starch and other

substances necessary for the

growth of the root


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Parts of the Root

Root Cap

Root Hairs

Vascular Tissue

Provides protection for the root tip

Site of absorption

Within cortex, contains cells that transport water,

nutrients, and minerals to all parts of the plant


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Root Functions

1. Absorption of water and nutrients

(performed by root hairs)

3. Anchor plant to maintain stability

Roots have 4 primary functions

2.Transportation of water and nutrients to stem

4. Store food and water


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Leaves

Blade

Main body of leaf

Petiole

Attaches blade to stem

Midrib

Large central vein


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Leaves

Apex

Tip of leaf

Base

Attaches to petiole, if petiole is absent

attaches directly to stem

Margin

Edge of leaf


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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


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Important Functions of

Leaves

Photosynthesis

Process that plants use to produce their food

6CO2 + 6H2OC6H1206 + 6 O2

Transpiration

Loss of water and exchange of carbon dioxide


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Parts of the Stem

NodeAreas where side branches

and leaves develop from

Internode

Area between nodes

Lenticles

Small holes located in the

stem (breathing pores)


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Functions of the Stem

1. Transports water and nutrients from roots to

leaves

2. Supports leaves, fruits and flowers

3. Food Storage


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Fruit Classification

Aggregate

Develop from a single flower

with many ovaries

Examples: Strawberries & Tulips


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Multiple

Fruit develops from a

group of tightly clustered

flowers

Examples: Pineapples & Figs


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Simple

Develop from asingle ovary

Examples: Cherries & Tomatoes


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Fruits Function

Site of seed production


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Flower Parts

Pistil

Female part of plant

Consists of:

Stigma

StyleOvary


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Flower Parts

Stamen

Male reproductive organ

Consists of:

Anther

Stamen


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Flower PartsPetals

Highly colored part of the flower, may contain

perfume and/or nectar glands

Sepals

Small green structures on the base of aflower that protect the flower bud


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Flower Classification

Complete flower Has all four male and female parts

Incompleteflower Missing one of the four male orfemale parts

Perfect flower Has stamens and pistils

Imperfect flower Lacking either stamens or pistils


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Flower Function

Sexual Reproduction is the flowers sole function

Pollination by:

Wind

Insects and Birds


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Parts of the Seed

Endosperm

Tissue that provides nutrition for the developing seed

Cotyledon

Food storage tissue

Embryo

Growing part of seed


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Parts of the Seed

Seedcoat

Protective outer covering of the seed

Scutellum

Absorbs the endosperm

2014plant parts & functions

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