Presentation on theme: "All about flowers Learn the parts of a flower and all about pollination."— Presentation transcript:
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 its 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! flower leaf stem roots Did you get them right!
A little information about Pollination In order to produce a new plant many flowering plants need to be pollinated. Lets 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. petal stigma ovary filament anther style sepal You can click on the names to find out more information. 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 Flower
Stigma The stigma receives the pollen from visiting insects. Click here to go back to The Parts of a Flower It is one of the female parts of a flower. The others are the style and the ovary. stigma
Style The style leads down to ovary. Click here to go back to The Parts of a Flower style It is another of the female parts of a flower.
Ovary Click here to go back to The Parts of a Flower 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 flower make the seeds. ovary
Filament Click here to go back to The Parts of a Flower 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
Anther Click here to go back to The Parts of a Flower The anther is one of the male parts of a flower. The anther and filament make the pollen. Together, they are called the stamen. The shape and size of the anther will attract the correct insects. anther
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 Flower
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. Lets find out some more!
Insects pollinate many flowering plants. The flower attracts the insect by using its 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.
The male cell travels down the tube Pollen grains land on the stigma The male cell fertilises the ovule Now the seeds start to develop and grow.
Pictures available from www.istockphoto.com or by Bev Evans, 2008www.istockphoto.com Presentation by Bev Evans, 2008, www.communication4all.co.uk www.communication4all.co.uk