Plant Structure Unit Mrs. Krajewski

Plant CharacteristicsPlant Cells

CELLS

Plants are made a small building blocks called cells. Different parts of a cell do different jobs.

Ex: some cells may have the job of making food for the plant

All plants are made up of cells.

CELLS: Make up a plant. Cells are organized into tissue and tissue is organized into organs.

What do plants need to survive?

Plants need:

•Sunlight•Water•Carbon dioxide•Minerals from the soil

Make a 4 fold!

Habitats

Plant Habitats:

Plants live in many different habitats. Some can survive in extremely cold or hot weather. Some plants such as lilies can grow in water by using the soil at the bottom of a pond!

Photosynthesis Chorophyll

The process of making the sugar, which is the food the plant needs to survive.

Plants make their own food!

Let’s read pages 48 and 49!

Photosynthesis takes place in chloroplasts of leaf cells.

Chloroplasts contain chlorophyll.

“chloro” is a Greek word for “green”. Chlorophyll makes plants green in color.

Chlorophyll captures energy from sunlight.

Questions – Text p. 49

Check Point Questions:

What are the 3 characteristics of plants?

In what part of a plant cell does photosynthesis occur?

Parts of a Plant

The Main Parts of a Plant:

1.Roots2.Stems3.Leaves

Roots

Roots:

Grow downward in the soil.

a) Function:1. absorb water from the soil.

2. absorb nutrients from the soil.

3. hold the plant in place

4. roots in some plants store food.

Types of Roots1. Taproots have one lard root (ex: dandelions, carrots, and parsnips).

2. Fibrous Roots spread out and no one root is larger or important than another.

3. Root Hairs: threadlike cells on a root that take in water and minerals. Most roots have root hairs.

Tap Roots

Fibrous Roots

Root Hairs

Stems

Stems

What is a stem?

A stem grows above ground level.

What is its function?

1. Carry water , minerals, and nutrients from the roots to the leaves.

2. Support leaves and flower.

Types of StemsWoody Stems

Soft, Green Stems

1. Woody Stems: Are found in larger

plants to give the plant extra support.

Types of StemsWoody Stems

Soft, Green Stems

2. Soft, Green stems:Are found in smaller plants like the strawberry plant or daisies.

Leaves

Leaves

What is a leaf?

The main food-making part of a leaf.

Main Parts:

1. Veins2. Epidermis3. Chlorophyll4. Stomata

Veins, Epidermis, Chlorophyll, and Stomata

Veins: are bundles of tubes that carry water to the leaf and food from the leaf to the stem and roots.

Epidermis: is the protective layers that keeps the leaf from drying out and losing water.

Chlorophyll: is a green substance which traps the sun’s energy; which is used to make food.

Stomata: are tiny openings on the bottom side of the leaf, which allows gas and water vapor to pass in and out.

Leaves

Types of Leaves:

1.Pinnate Leaves

2.Palmate Leaves

Pinnate Leaves

Pinnate: Have parallel veins

(running the same direction).

Example: grass, corn, tulips, and onions.

Grass, corn, tulips, and onions.

GRASS LEAVES

ONION LEAVESTULIP LEAVES CORN LEAVES

Palmate Leaves

Palmate: Have veins that

branch out from the center of the leaf.

Ex: maple, rose, and poinsettia leaves.

Maple, rose, or poinsettia?

MAPLE

ROSE POINSETTIA

What type of leaf is it?PALMATE LEAVES

PINNATE LEAVES

homeworkRelate to Social Studies

1. PICK A STATE2. FIND THE STATE FLOWER3. WRITE ONE FACT ABOUT THE STATE FLOWER4. DOES IT HAVE PINNATE OR PALMATE LEAVES?5. PRINT OR DRAW A PICTURE

Life Cycle of a Flowering Plant

Cycle:

1.Seeds2.Seedlings3.Mature

Plant4.Flowers5.Fruit6.Seed

Part 1Seeds: an underdeveloped plant with stored food sealed in a protective covering, seed coat. Ex: coconut seed

Part 2Seedlings: the germination of a seed sprouting into a new, young plant.

Part 3Mature Plant: the plant has grown enough to produce its own seeds.

Part 4Flowers: the mature plant will produce flowers that will be pollinated by insects or wind.

Part 5Fruit: the ovary of some flowers will grow into fruit which surrounds the new seed.

Ex: apples and peaches.

Part 6Seed: the ovary of some flowers become seeds or seed pods.

Ex: apples and peaches.