define immune system in detail?

Asked by izhanjaveed | 30th Jun, 2008, 09:33: PM

Expert Answer:

Our immune system protects  our body from invasion by foreign substances. It is a complex network of specialized cells and organs distributed throughout the body and working in a coordinated manner to defend the body..

T cells are a type of lymphocytes. They are derived from the thymus and are responsible for the cell-mediated or cellular immune response.

B cells are another type of lymphocytes. They develop in the bone marrow. Their main role is the production of antibodies against foreign particles.

Antigens are foreign substances that can stimulate an immune response in the body. They include toxins, bacteria, foreign blood cells etc. Our body produces specific antibodies to fight with these antigens.

Answered by  | 1st Jul, 2008, 09:20: AM

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