immune system definition

  • noun:
    • The integrated human body of body organs, tissues, cells, and cell services and products particularly antibodies that differentiates self from nonself and neutralizes possibly pathogenic organisms or substances.
    • The system that differentiates self from non-self and shields your body from foreign substances and pathogenic organisms by making an immune reaction. It includes organs including the thymus, the spleen and lymph nodes; tissue particularly bone marrow, and lymphoid areas like the tonsils; cells such lymphocytes like the B cells and T cells, and cellular items eg antibodies.
    • The complex of cells, mobile procedures, and substances within and diffused throughout an organism which enable the system to counteract or destroy noxious foreign substances launched in to the human anatomy, destroy infectious representatives particularly bacteria and viruses, destroy malignant cells, and remove mobile debris, hence protecting the system against most potentially harmful outside representatives and interior events might cause sickness or demise. The machine has many interacting components, including circulating antibodies, antibody-producing cells, white-blood cells and lymphokines, lymph tissue and lymph nodes, and stem cells which could distinguish into other types of cell, together with the thymus and spleen. The system is responsible for the occurrence of immunity{3}. See also immunoglobulin and antibody.
    • a method (such as the thymus and bone tissue marrow and lymphoid cells) that shields the body from foreign substances and pathogenic organisms by making the protected reaction

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