PLANT PARTS AND ITS FUNCTIONS

1. Plant Parts and
Functions

2. Parts of The Plant

3. Roots
2 Types of Root Systems
Taproot System
Primary root grows down
from the stem with some
small secondary roots
forming
Examples: Carrots & Turnips

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

5. 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

6. 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

7. 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

8. Leaves
Blade
Main body of leaf
Petiole
Attaches blade to stem
Midrib
Large central vein

9. Leaves
Apex
Tip of leaf
Base
Attaches to petiole, if petiole is absent
attaches directly to stem
Margin
Edge of leaf

10. 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

11. 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

12. 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)

14. Functions of the Stem
1. Transports water and nutrients from
roots to leaves
2. Supports leaves, fruits and flowers
3. Food Storage

15. Fruit Classification
Aggregate
Develop from a single
flower with many ovaries
Examples: Strawberries & Tulips

16. Fruit Classification
Multiple
Fruit develops from a
group of tightly
clustered flowers
Examples: Pineapples & Figs

17. Fruit Classification
Simple
Develop from a
single ovary
Examples: Cherries & Tomatoes

18. Fruit’s Function
Site of seed production

20. Flower Parts
Pistil
Female part of plant
Consists of:
•Stigma
•Style
•Ovary

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

22. 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

23. Flower Classification
Complete flower Has all four male and female parts
Incomplete flower Missing one of the four male or
female parts
Perfect flower Has stamens and pistils
Imperfect flower Lacking either stamens or pistils

24. Flower Function
Sexual Reproduction is the flowers sole function
Pollination by:
Wind
Insects and Birds

25. Parts of the Seed
Endosperm
Tissue that provides nutrition for the developing seed
Cotyledon
Food storage tissue
Embryo
Growing part of seed

26. Parts of the Seed
Seedcoat
Protective outer covering of the
seed
Scutellum
Absorbs the endosperm