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  2. Adaptive immune system - Wikipedia

    en.wikipedia.org/wiki/Adaptive_immune_system

    The adaptive immune system, ... and activation of other innate immune cells to an activated state that confers a short-term "immune memory". In this sense, "adaptive ...

  3. Immune system - Wikipedia

    en.wikipedia.org/wiki/Immune_system

    The adaptive immune system evolved in early vertebrates and allows for a stronger immune response as well as immunological memory, where each pathogen is "remembered" by a signature antigen. [55] The adaptive immune response is antigen-specific and requires the recognition of specific "non-self" antigens during a process called antigen ...

  4. Immune response - Wikipedia

    en.wikipedia.org/wiki/Immune_response

    The adaptive immune response is the body's second line of defense. The cells of the adaptive immune system are extremely specific because during early developmental stages the B and T cells develop antigen receptors that are specific to only certain antigens. This is extremely important for B and T cell activation.

  5. Complement system - Wikipedia

    en.wikipedia.org/wiki/Complement_system

    Scheme of the complement system. The complement system, also known as complement cascade, is a part of the humoral, innate immune system and enhances (complements) the ability of antibodies and phagocytic cells to clear microbes and damaged cells from an organism, promote inflammation, and attack the pathogen's cell membrane. [1]

  6. Immunological memory - Wikipedia

    en.wikipedia.org/wiki/Immunological_memory

    The adaptive immune system and antigen-specific receptor generation (TCR, antibodies) are responsible for adaptive immune memory. [citation needed] After the inflammatory immune response to danger-associated antigen, some of the antigen-specific T cells and B cells persist in the body and become long-living memory T and B cells. After the ...

  7. T helper cell - Wikipedia

    en.wikipedia.org/wiki/T_helper_cell

    Activation of macrophage or B cell by T helper cell. The T helper cells (T h cells), also known as CD4 + cells or CD4-positive cells, are a type of T cell that play an important role in the adaptive immune system. They aid the activity of other immune cells by releasing cytokines.

  8. Cell-mediated immunity - Wikipedia

    en.wikipedia.org/wiki/Cell-mediated_immunity

    In the late 19th century Hippocratic tradition medicine system, the immune system was imagined into two branches: humoral immunity, for which the protective function of immunization could be found in the humor (cell-free bodily fluid or serum) and cellular immunity, for which the protective function of immunization was associated with cells.

  9. Classical complement pathway - Wikipedia

    en.wikipedia.org/wiki/Classical_complement_pathway

    Classical complement activation has also been shown to combat Methicillin-resistant Staphylococcus aureus. [10] Certain variants of the IgM antibody were found to bind the Methicillin-resistant Staphylococcus aureus these IgM were found to be critical in complement activation through the classical pathway and subsequent destruction of the bacteria.