What are bacteria for?

Bacteria play an important role in the life of all organisms. Bacteria are in symbiosis with many animals, including humans. They live in our intestines and secrete digestive enzymes that our stomach and pancreas cannot secrete. Also, many types of bacteria are involved in the conversion of organic substances into inorganic ones. For example – decomposition of the remains of living organisms and organic waste. This ensures the balance of inorganic substances in nature and their circulation takes place.