with identifying and potentially destroying pathogens that have passed through the physical barriers
The human body's three main defensive mechanisms work together to fend off invaders including viruses, bacteria, and fungi. Physical and chemical barriers, general innate reactions, and particular adaptive responses are the three lines of defense of the immune system.
Describe a pathogen. An organism that infects its host with disease is referred to as a pathogen, and the severity of the disease symptoms is referred to as virulence. Pathogens include viruses, bacteria, unicellular and multicellular eukaryotes, as well as other taxonomically diverse organisms.What are pathogens and some instances?
Pathogens, such as bacteria, fungi, protozoa, worms, viruses, and even infectious proteins known as prions, are what cause infectious diseases. All types of pathogens must have ways to enter their host and avoid being immediately destroyed by the host immune system. Most bacteria do not cause disease.
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