Microorganisms.

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Presentation transcript:

Microorganisms

Microorganisms Small, living organisms that are not visible to the naked eye Found everywhere! Including ON and IN the human body

Nonpathogen vs Pathogen Microorganisms can be pathogens or nonpathogens. Nonpathogens can be part of the normal flora of the body and are beneficial to us Flora=plant life adapted for living in specific environment Pathogens cause disease and infection

GERMS! If they are pathogenic, we call them GERMS! Can be helpful in one part of the body but pathogenic when present in another part of the body FOR EXAMPLE- E. Coli is part of large intestinal flora, but if it is in the urinary tract, it can cause an UTI

Reproduction of Microorganisms What they need Warm environment Darkness; can be killed by sunlight Food and moisture Oxygen to live-aerobic No oxygen to live-anaerobic

Classes of Microorganisms Bacteria Protozoa Fungi Rickettsiae Virus Helminth