IMMUNE SYSTEM

Innate vs. Adaptive Immunity

Innate immunity refers to the nonspecific mechanisms which tend to show up when an antigen shows up in the body. Examples of innate defense mechanisms include cells that attack foreign substances, chemicals and skin. Adaptive immunity is mechanisms that are specific, depending on the antigen, and is when several hundreds of attack cells are created to attack that antigen.

Humoral vs. Cell Mediated

There are two types of immune systems: humoral and cell mediated. The humoral system consists of b-cells which are made in the bone marrow, and these b-cells have the ability to produce antibodies if it is first exposed to an antigen. Antibodies eliminate antigens by attaching onto it, and then destroying it. In a cell mediated immune system, t-cells which also originate in the bone marrow, but then go through the thymus. There are three types of t-cells: cytotoxic, helper and supressor.
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