An example of mucus, a non specific defense of the body against pathogens
Non- Specific Defenses are the body's first defense against pathogens. Some examples of these are the skin, tears and other secrations, inflammatory responses, interferons, and fever.
Skin, saliva, mucus, and stomach secretions are part of the first line of defense.
The second line of defense includes inflammatory responses 9where infected ares become red and painful), histamines (increase the flow of fluids such as blood to the infected area), interferons (proteins that inhibit synthesis of viral proteins), and fever (a releasing of chemicals that increases body temperatures).
The immune systems specific defenses kill anything foreign that enters the body.
When a specific defense recognizes, attacks, and "remembers" a foreign substance, that process is called immune response.
An antigen is a substance that triggers an immune response.
Antibodies tag antigens for destruction by immune cells.
The main cells of immune responses are b lymphocytes and T lymphocytes.
A specific immune response has two ways of carrying out its duty: humoral immunity and cell mediated immunity.
Humoral Immunity is activated when a few B cells bind to antigens on the surface of pathogens.
Plasma Cells produce antibodies that are carried through the blood stream.
Memory B cells recognize pathogens and will produce new plasma cells to counter the pathogen should it ever return.
Cell-Mediated Immunity defends the body against viruses, fungi, and single celled pathogens.
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