What are Microbes?.

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Presentation transcript:

What are Microbes?

Microbes Are invisible to the naked eye, you need a powerful microscope to see them. Are everywhere around us, inside us, on us, in our food, in our homes, in the air we breathe and the water we wash in. Are mostly useful, but some are harmful Have been around for 3.8 bn years. Are vital for life on Earth.

What do Microbes look like ? Magnified 1000’s of times and coloured using dye, we see -

Microbes exist in huge numbers In one single teaspoon of garden soil, there are over 100,000 microbes. In 1ltr of seawater, there are over 1bn microbes. On your hands there are more microbes than there are people in the world. There are so many microbes, that scientists have only named 0.5% of them. Microbes outnumber all other species and make up most of the living matter on the planet.

Microbes – three types Bacteria strep bacteria Virus rotavirus Fungi mold

Microbes are living organisms What Microbes? are Microbes are living organisms They are so small we need a microscope to see them They come in different shapes and sizes They are found EVERYWHERE! Some microbes are useful or even good for us Some microbes can make us ill

Bacteria Have three main shapes spira l(boriella) little balls(-cocci) rods (-bacilli) Can move about on their own

There are three different types of bacteria. They look like: What Microbes? are BACTERIA There are three different types of bacteria. They look like: Spirals Rods Balls (Campylobacter) (Lactobacillus) (Staphylococcus) They are so small that 1000s of bacteria could fit on the full period at the end of this sentence. Some bacteria are helpful in cooking, for example, making yogurt and cheese. Some bacteria are harmful and cause infection. Bacteria multiply very fast.

What can bacteria do ? Bacteria in the Cafeteria - lets find out using this webpage. We have learned that bacteria do many good things, such as decompose waste and give texture and flavour to food. However, they can also cause illness. They give off oxygen when they ‘eat’. Half of all the oxygen in the world, comes from bacteria.

Virus Come in 1000s of different shapes and sizes. They hang about waiting to meet a ‘host’ which they then invade, hijacking the host’s cells. Beware the air you breathe and door handles !

Influenza What Microbes? are VIRUSES Viruses are even smaller than bacteria and can sometimes live INSIDE bacteria! Most viruses make us sick. Diseases like CHICKENPOX and the FLU are caused by viruses. Viruses are easily spread from one person to another. VIRUSES

Fungi Not just mushrooms – athlete’s foot, penicillin, and yeast. Yeast is used in bread making, and brewing

Penicillium Dermatophyte What Microbes? are FUNGI Penicillium Dermatophyte Fungi are the largest of all microbes. Fungi can be found in the air, on plants and in water. Mould, which grows on bread, is a type of fungi. Some antibiotics are made by fungi!

Microbes live among us In our food Cleaning up our waste Killing pests Making medicines In the making of such things as leather, soy sauce, cheese and paper. In our bodies. Microbes in our mouths

And finally Without microbes, life on this planet would be entirely different – they generate oxygen, are part of the carbon and nitrogen cycles, and can survive the harshest conditions. Without microbes, our bodies would not process the food we eat. They drive the chemistry of life, breaking things down into their parts so that life can being again. Microbes are small but mighty !

Also Protists are a type of Microbe Types of Microbes Bacteria Virus Fungi Also Protists are a type of Microbe

There is one more type Protist- There are some microbes that do not fit into any of the other types. These are put into a category called Protists.

One last thing…. Pseudopods-false feet