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  2. White blood cell - Wikipedia

    en.wikipedia.org/wiki/White_blood_cell

    White blood cells (scientific name leukocytes), also called immune cells or immunocytes, are cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders. White blood cells include three main subtypes: granulocytes, lymphocytes and monocytes.

  3. Innate immune system - Wikipedia

    en.wikipedia.org/wiki/Innate_immune_system

    The innate immune system is an alternate defense strategy and is the dominant immune system response found in plants, fungi, prokaryotes, and invertebrates (see Beyond vertebrates). [2] The major functions of the innate immune system are to: act as a physical and chemical barrier to infectious agents; via physical measures such as skin and ...

  4. Immune system - Wikipedia

    en.wikipedia.org/wiki/Immune_system

    Some leukocytes (white blood cells) act like independent, single-celled organisms and are the second arm of the innate immune system. The innate leukocytes include the "professional" phagocytes (macrophages, neutrophils, and dendritic cells). These cells identify and eliminate pathogens, either by attacking larger pathogens through contact or ...

  5. Lymphocyte - Wikipedia

    en.wikipedia.org/wiki/Lymphocyte

    A lymphocyte is a type of white blood cell (leukocyte) in the immune system of most vertebrates. [1] Lymphocytes include T cells (for cell-mediated and cytotoxic adaptive immunity), B cells (for humoral, antibody-driven adaptive immunity), [2] [3] and innate lymphoid cells (ILCs; "innate T cell-like" cells involved in mucosal immunity and homeostasis), of which natural killer cells are an ...

  6. Human leukocyte antigen - Wikipedia

    en.wikipedia.org/wiki/Human_leukocyte_antigen

    Membranome. 63. HLA region of Chromosome 6. The human leukocyte antigen (HLA) system is a complex of genes on chromosome 6 in humans that encode cell-surface proteins responsible for regulation of the immune system. [1] The HLA system is also known as the human version of the major histocompatibility complex (MHC) found in many animals. [2]

  7. Neutrophil - Wikipedia

    en.wikipedia.org/wiki/Neutrophil

    Neutrophils are a type of phagocytic white blood cell and part of innate immunity. More specifically, they form the most abundant type of granulocytes and make up 40% to 70% of all white blood cells in humans. [ 1 ] Their functions vary in different animals. [ 2 ] They are also known as neutrocytes, heterophils or polymorphonuclear leukocytes.

  8. T cell - Wikipedia

    en.wikipedia.org/wiki/T_cell

    Contents. T cell. T cells are one of the important types of white blood cells of the immune system and play a central role in the adaptive immune response. T cells can be distinguished from other lymphocytes by the presence of a T-cell receptor (TCR) on their cell surface. T cells are born from hematopoietic stem cells, [ 1 ] found in the bone ...

  9. Interleukin - Wikipedia

    en.wikipedia.org/wiki/Interleukin

    The function of the immune system primarily depends on interleukins, and rare deficiencies of a number of them have been described, all featuring autoimmune diseases or immune deficiency. The majority of interleukins are synthesized by CD4 helper T-lymphocytes , as well as through monocytes , macrophages , and endothelial cells.