Antigens is the term for molecules that are foreign to the body.
Leukocytes
Leukocytes
Foreign substances would suffice as well as contaminants, toxins, etc.
antigens
It protects the body from foreign substances and pathogenic organisms by producing the immune response. <a href="http://www.tedthomas.com/">tax deeds for sale</a>
To rid your body of foreign substances in your nose,
Immune system
antibodies
Substances foreign to the body are typically called antigens. These can include viruses, bacteria, toxins, and other microorganisms that are not naturally present in the body. When the immune system detects these foreign substances, it mounts a response to eliminate them and protect the body from potential harm.
The body's defense system is the immune system.
T-cellls
immunology