Transcript All about flowers - Communication4All

All about flowers
Learn the parts of a flower and all
about pollination
Notes for teachers
• You can use this presentation
straight through, using the action
buttons to navigate, or in chunks
using the index slide and action
buttons. Some text boxes and shapes
are also action buttons.
Index slide
• Use these quick links to look at certain
parts of the presentation
Introduction (inc. parts of a plant)
Parts of a flower
Pollination
All about flowers
• Flowers are vital to the reproduction
of flowering plants.
• Flowers are made up of several
different parts.
• Each part is important in it’s own
special way.
Parts of a flowering plant
Can you name all the parts of this plant? Click
on the arrows to see if you are correct!
Did you get
them right!
stem
roots
flower
leaf
A little information about
Pollination
• In order to produce a new
plant many flowering
plants need to be
pollinated.
• Let’s learn the parts of
the flower – then we can
find out more about
pollination.
index slide
Parts of the flower
Now we are going to look more closely at the
flower. Click the arrows to find the names.
You can click on the
petal
names to find out
more information.
stigma
anther
style
filament
ovary
sepal
About pollination
Petal
• The petal attracts insects
to visit the flower.
• The colours that we see in
the flower petals are quite
different to those seen by
insects, with their
specialised eyes.
Click here to go back to ‘The Parts of a
Stigma
• The stigma receives the pollen from
visiting insects.
stigma
• It is one of the
female parts of a
flower. The others
are the style and
the ovary.
Click here to go back to ‘The Parts of a
Style
• The style leads down to ovary.
• It is another of the
female parts of a
flower.
style
Click here to go back to ‘The Parts of a
Ovary
• The ovary is located at the base of
the flower
• The three female parts
of a flower are, together,
called the pistil or the
carpel.
• The female parts of a ovary
flower make the seeds.
Click here to go back to ‘The Parts of a
Filament
• The filament is one of the male parts
of a flower.
• The other male part is
called the anther.
• Together they are
called the stamen.
filament
Click here to go back to ‘The Parts of a
Anther
• The anther is one of the male parts
of a flower.
• The shape and size of the anther will
attract the correct insects.
• The anther and
filament make the
pollen. Together, they
anther
are called the
stamen.
Click here to go back to ‘The Parts of a
Sepal
• The sepal is usually green.
• It is the part of the flower that
protects the bud.
• It is not part of the
pollination process.
sepal
Click here to go back to ‘The Parts of a
Pollination
• In order to produce a new plant many
flowering plants need to be pollinated.
•This means that
pollen, produced
by the stamen,
needs to reach the
stigma.
• Many plants cannot be pollinated by their
own pollen.
•The pollen must land
on another plant of the
same type.
•This is called
cross pollination.
•Let’s find out some more!
•Insects pollinate many
flowering plants.
•The flower attracts the
insect by using it’s colours
and smells.
The insect arrives at a flower to collect the
nectar, which is a sweet liquid.
While the insect is collecting the nectar, the
male parts of the flower brush it with pollen.
•The insect then travels to another flower
where the pollen brushes off onto the female
parts of that flower.
•If the pollen is from the same type of flower
then it pollinates the visited flower.
•The pollen from the first flower sticks to the
sticky stigma.
•Part of the pollen called the male cell travels
down the style.
•The male cell then enters the ovary.
•Within the ovary the male cell joins with the
ovule.
•The plant has then been fertilised.
•After fertilisation the seeds start to grow.
•The ovary of the flower becomes the fruit
containing the seeds.
Pollen grains land on the stigma
The male cell
travels down
the tube
The male cell
fertilises the
ovule
Now the
seeds start
to develop
and grow.
Pictures available from www.istockphoto.com
or by Bev Evans, 2008
Presentation by Bev Evans, 2008,
www.communication4all.co.uk