The document summarizes the parts of a flower and their roles in reproduction. It explains that flowers contain reproductive organs and are made up of four main parts: sepals, petals, stamens, and pistils. The sepals protect the bud, petals attract pollinators, stamens produce pollen as the male part, and pistils receive pollen and contain ovaries to produce seeds as the female part. Pollination occurs through pollen transfer from the stamen to the pistil by wind, insects, or other animals. Fertilization happens when pollen grains fuse with egg cells in the ovary, developing into seeds and eventually fruit to protect and disperse the seeds.

1. PARTS of a FLOWER
“ Everything We think
We Know About….”
1. Do all plants reproduce
in the same manner?
2. Are there male and
female parts of
plants?
3. Is there connection
between flowers,
fruits and seeds?

2. Flowers contain the reproductive
organs of a plant.
• Plants need flowers
to help them to
reproduce.
• Each part has a job
to do in the
reproduction
process.

3. The Parts of a flower
• Most flowers have
four parts:
• Sepals
• Petals
• Stamens
• Pistil

4. Parts of a flower
• Sepals are green
leaves that protect
the bud until it
opens.

5. Parts of a flower
• Petals in some
flowers are bright
and colourful to
attract insects.
Para ver esta película, debe
disponer de QuickTime™ y de
un descompresor .

6. Pistil (female)
• Pistil consists of:
• The stigma receives pollen.
• The style is a bottle-shaped organ which join the
ovary and the stigma.
• The ovary where the seeds are produced.
Para ver esta película, debe
disponer de QuickTime™ y de
un descompresor .

7. Stamen (male)
• This is the male part of the flower or stamen.
• The Anther produces pollen grains. When the
grains are fully grown, the anther splits open.
• The filament supports the anther.

8. Taking turns
• The male and
female parts of a
flower often
mature at
different times.
• This makes sure
that the flower
does not pollinate
itself.
Para ver esta película, debe
disponer de QuickTime™ y de
un descompresor .
Para ver esta película, debe
disponer de QuickTime™ y de
un descompresor .

9. A SIMPLE FLOWER
DISSECTED

10. A simple flower dissected: A
Lily
Para ver esta película, debe
disponer de QuickTime™ y de
un descompresor .

11. PERFECT or IMPERFECT
FLOWER
• A perfect flower is one
with both the stamen
and pistil.
• An imperfect flower is
one that lacks one of
the sex organs.

12. Pollination
• Flowering plants
use the wind,
insects, bats,birds
and mammals to
transfer pollen
from the
male(stamen) part
of the flower to
the female (stigma)
part of the flower.

13. Pollination
• A flower is
pollinated when a
pollen grain lands in
its stigma.
• The pollen fuses
with an egg cell
(ovule) to produce a
seed.
Para ver esta película, debe
disponer de QuickTime™ y de
un descompresor .

14. Types of Pollination
Self-pollination, male & female parts
on the same flower.
Cross-pollination, male & female parts
on different flowers.

15. Fertilization
• Pollen grains land on the
stigma,germinates and
grows down style to the
ovary where pollen
fertilizes the egg.
• Fertilized ovules develop
into seeds.
• The pistil enlarges to
form the flesh of the
fruit and to protect the
ovary.

16. Fertilization
• The seed or seeds,
surrounded by the ovary
wall develop into the
fruit.
• In some plants, other
parts of the flower can
also help to form the
fruit.

17. Seed dispersal
Seeds are dispersed
in many different
ways:
• Wind
• Insects & other animals
• Water
• Explosion
• Scatter

18. Wind pollination
• Some flowers, such
as grasses do not
have brightly
coloured petals and
nectar to attract
insects.
• They do not have
stamens and pistil.
• These flowers are
pollinated by the
wind.