Answer:
Microorganisms are very small, not visible with an eye, including bacteria, viruses, fungi, and parasites.
Even though som of microorganisms can make people ill, many of them are not harmful, all the contrary, they can help a human with digestion, protect him from infections and keep the health good.
Step-by-step explanation:
You have bad microorganisms in the body, called pathogens. Pathogens can be very harmful and kill all the good cells in the host. That is why good microorganisms are important. They make colonies and protect the body from the development of pathogens that release toxins into the body.
Good microorganisms provide nutrition for the organism, they involve minerals, produce hormones and stop bad microorganisms enter the organism.