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.
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tonsils
Tonsils
The immune system and the lymphatic system work together to protect the body from pathogens. The immune system recognizes and targets pathogens, while the lymphatic system helps circulate immune cells and remove pathogens from the body. Additionally, the skin and mucous membranes act as physical barriers to prevent pathogens from entering the body.
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.
Immune system,
Resident normal flora compete with pathogens for nutrients and space, thereby preventing pathogens from colonizing and causing infections. Additionally, normal flora can produce substances that inhibit the growth of pathogens or modulate the immune response to promote defense against invading pathogenic organisms.
Many seeds have a waxy coating to protect them from desiccation, pathogens, and predators. The wax helps retain moisture, repels water and pathogens, and acts as a physical barrier against predators.
Because our bodies have evolved to defend ourselves from these pathogens. We have an "immune system".
they attack it
Viral infections and cancerous cells