Escherichia coli is "alive" in the human digestive tract and helps us digest. And the delicious and refreshing mushrooms we usually eat belong to fungi. In fact, many microbial metabolites can also be used as therapeutic drugs for human beings, such as penicillin and erythromycin.
It can be seen that in the process of biological evolution, microorganisms and the human body maintain an ecological balance. Some microorganisms and the human body have formed an ecological balance of interdependence and mutual benefit. This is called normal flora, which is beneficial and harmless to the host. When people are born, they are in close contact with the surrounding natural environment rich in microorganisms, so there are different kinds and quantities of microorganisms living in human skin, mouth, upper respiratory tract, intestine, urogenital tract and other mucous membranes and cavities. They have the functions of nutrition, immunity, biological antagonism and anti-aging.
Microbes bring so many benefits to human body and our life. Therefore, with the development of science and technology, the application of microorganisms is more and more extensive. Microbes play an important role in biopharmaceuticals, energy, environmental protection, food and industry.