Microorganisms are organisms that are very small in size and cannot be seen with the naked eye without a microscope. They are very important for our life as they play an important role in various processes such as digestion, immunity and reproduction.
Microorganisms can be both beneficial and harmful to our body. For example, beneficial microorganisms such as lactobacilli and bifidobacteria help us digest food, strengthen the immune system, and prevent various diseases. Harmful microorganisms, such as pathogenic bacteria and viruses, can cause various diseases such as infections, allergies and cancer.
Various techniques are used to study microorganisms, including microscopy, culture techniques, and molecular biology. Microorganisms are an important part of the ecosystem, and studying them can help in understanding various processes occurring in nature.