Ima

Definition:

Microorganisms are very small living organisms that can be seen only under a microscope.

Where are they found?

Microorganisms are found everywhere:

• In air

• In water

• In soil

• Inside our body

• On food

Types of Microorganisms

1. Bacteria

   • Single-celled

   • Found everywhere

   • Some are helpful, some cause diseases

2. Viruses

   • Very tiny (smaller than bacteria)

   • Can live only inside living cells

   • Cause diseases like cold and flu

3. Fungi

   • Examples: yeast, mould

   • Can be helpful or harmful

4. Protozoa

   • Single-celled organisms

   • Found in water

   • Example: Amoeba

5. Algae

   • Mostly found in water

   • Make their own food using sunlight

Useful Microorganisms

• Help in making curd and bread 

• Help in digestion

• Used to make medicines and vaccines

• Help plants grow by improving soil

Harmful Microorganisms

• Cause diseases (cholera, typhoid, flu)

• Spoil food

• Cause infections

Fun Facts

Your body has more microorganisms than body cells!