Firstly if your body gets infected with an unknown pathogen then it will build a memory so next the pathogen that infect the body will automatically eliminated and second how the body gets rid of the pathogen is by sending antibodies or whiteblood cells to kill the invaders
how does residental normal flora protect the body against pathogens
The pores on your skin help to prevent harmful pathogens from entering. Pathogens cause disease, infection and Cancer. By keeping these pathogens out, this is how pores protect you.
Immune system,
the body protect itself when such an accident happen by it's recovering materials that can protect it from any accident .
they attack it
They don't defend pathogens. They defend *against*pathogens. They poison them, they burn them with ozone / hydrogen peroxide / sodium hypochlorite / chorine dioxide, and then they eat them whole if necessary.
Your body is really a possible large dinner table for pathogens that are found everywhere. You need as many defenses as you have to fend them off.
Viral infections and cancerous cells
Serves as a physical barrier to keep pathogens out.
The ability of the body to protects itself from its environment is called homeostasis.
tears
They are similar because they both protect the body and fight against pathogens.