Parts of a Plant
and
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 • Embryo (baby
plant)—beginning
• Cotyledon—stored food
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.
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.
This process from seed to adult plant to
flower to seed is called:
The
flowers
make
seeds.
The seeds are
scattered—
ready to grow.
The seed absorbs
water.
The root
pushes through
the seed coat.
Life Cycle of a
Bean Plant
The stem
and its
leaves grow
toward the
sunlight.
The leaves
make food
for the plant.
The seedling
(new plant)
grows out of
the ground.
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.
Two useful websites
http://www.mbgnet.net/bioplants/parts.html
This next one is a exercise on the things that are necessary for a seed
to germinate.
http://www.ngflcymru.org.uk/vtc/factors_plant_growth/eng/
Introduction/MainSessionPart2.htm
Remember…
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.
The seedling grows into an adult
plant and flowers.
The flowers produce seeds.
Let’s Review!
1. The parts of a plants are the
a. r_ _ ts
b. st_ _ s
c. l_ _ _es
d. fl_ _ _ers
roots
stems
leaves
flowers
2. What do plants need
to grow?
a. c _ _ _ _on dioxide from the _ _ _
b. w _ _ _ _
c. l _ gh_ from the _ _ _
a. carbon dioxide from the air
b. water
c. light from the Sun
3. Roots of a plant
a. take in sunlight
b. take in water from the soil
c. hold the plant in the soil so it does
not blow away
d. Both b and c
4. The stem of a plant
a. takes in sunlight
b. takes in water from the soil
c. carries the water from the roots to
the leaves
d. holds the seeds
5. A plant need leaves to
a.
b.
c.
d.
take in sunlight
take in carbon dioxide from the air
make food
all of the above
6. The flowers of a plant
a. take in sunlight
b. make seeds for the plant
c. carry the water from the roots to
the leaves
d. take in water from the soil
6. Seeds are important to the
plant because they
a.
b.
c.
d.
take in sunlight
take in water from the soil
make new plants
make food for the plant
Inside a seed, there is
a.
b.
c.
d.
a tiny leaf, root and stem
a flower
stored food
both a and c
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.