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Are there microorganisms all around us?
Microscopic organisms, commonly known as microorganisms or microbes, are found all around us and even inside our bodies.
The category 'Microbes' includes a massive range of organisms including bacteria, fungi, viruses, algae, archaea and protozoa.
Microbes grow and reproduce in habitats where no other organisms can survive.
Microbes also are found in more mundane places, such as on our hands, in the air and in soil.
The human body contains trillions of microorganisms - outnumbering human cells by 10 to 1. Because of their small size, however, microorganisms make up only about 1 to 3 per cent of the body's mass (in a 200-pound adult, that's 2 to 6 pounds of bacteria), but play a vital role in human health.
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