Parts of a Plantand

The Life Cycle of a Plant

Parts of a Plant

Parts of a Plant• Roots hold the plant in the soil so it doesn’t blow away.

They also take in water.

Parts of a Plant• The stem holds up the plant and carries

water from the roots to the leaves.

Parts of a Plant• The leaves use light from the Sun, carbon

dioxide from the air and the water taken in by the roots to make food for the plant.

Parts of a Plant• The plant’s flowers make seeds.

Flower

• Dandelion flower and seeds.

Parts of a Seed

• Seed Coat– protects seed

• Cotyledon—stored food

• Embryo (baby plant)—beginning leaves, stem and root

Embryo—baby plant

Seeds• Seeds are formed in the center part of

the flower or in the fruit. Fruits come from flowers.

• Seeds come in many shapes and sizes.• Plants grow from seeds.

If a seed receives water and gets warm, the baby plant (embryo) inside it starts to grow.

The process of a baby plant beginning to grow is called germination. We say the seed germinates or sprouts.

The first part of the plant we see pushing its way out of the seed coat is the root.

Here we see pictures of a bean seed and a corn seed germinating (sprouting) and growing into plants with roots, stems and leaves.

Here is a speeded up picture of a bean seed germinating and growing.

This process from seed to adult plant to flower to seed is called:

After the seed germinates (sprouts) and grows into an adult plant, the plant flowers.

It is the flower that makes seeds for new plants to grow and develop.

Life Cycle of aBean Plant

The seed absorbs water.

The seedling (new plant) grows out of the ground.

The stem and its leaves grow toward the sunlight. The leaves make food for the plant.

The flowers make seeds. The root pushes

through the seed coat.

The seeds are scattered—ready to grow.

Here is another diagram of the life cycle of a plant

Here is the life cycle of a tree.

How a Seed Grows into a New Plant• The life of a plant begins as a seed.• Once a seed is watered and warmed, it germinates.• The root pushes through the seed coat.• The roots of the seedling grow down into the soil and the leaves and stem

push out of the ground.• The stem and its leaves grow toward the sunlight.• The leaves make the plant’s food.• The flowers form and bloom. • New seeds are formed inside the flower or within the fruit that comes after

the flower dies• The seeds are scattered and wait to start growing.

http://www.mbgnet.net/bioplants/parts.html

Two useful websites

http://www.ngfl-cymru.org.uk/vtc/factors_plant_growth/eng/Introduction/MainSessionPart2.htm

This next one is a exercise on the things that are necessary for a seed to germinate.

When the embryo (baby plant) inside the seed begins to grow, we say the seed sprouts or germinates.The young plant that grows from a seed is the seedling.

Remember…

The seedling grows into an adult plant and flowers.

The flowers produce seeds.

Let’s Review!

rootsstemsleaves

flowers

1. The parts of a plants are thea.r_ _ tsb.st_ _ sc.l_ _ _es

d.fl_ _ _ers

2. What do plants need to grow?

a. carbon dioxide from the airb. waterc. light from the Sun

a. c _ _ _ _on dioxide from the _ _ _b. w _ _ _ _c. l _ gh_ from the _ _ _

3. Roots of a plant

a. take in sunlightb. take in water from the soilc. hold the plant in the soil so it does

not blow awayd. Both b and c

4. The stem of a plant

a. takes in sunlightb. takes in water from the soilc. carries the water from the roots to

the leavesd. holds the seeds

5. A plant need leaves to

a. take in sunlightb. take in carbon dioxide from the airc. make foodd. all of the above

6. The flowers of a plant

a. take in sunlightb. make seeds for the plantc. carry the water from the roots to

the leavesd. take in water from the soil

6. Seeds are important to the plant because they

a. take in sunlightb. take in water from the soilc. make new plantsd. make food for the plant

a. a tiny leaf, root and stemb. a flowerc. stored foodd. both a and c

Inside a seed, there is

Starting with the seed (number 1), number the plant’s life cycle in the correct order.

1.

Congratulations!

You have learned about the parts of a plant, about seeds, and about a plant’s life cycle.