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  1. Complement System | British Society for Immunology

    Complement was discovered by Jules Bordet as a heat-labile component of normal plasma that causes the opsonisation and killing of bacteria. The complement system refers to a series of …

  2. Complement Pathways: Types, Functions, Regulation

    The complement pathways is a part of the innate immune system and consists of a series of proteins that interact with one another in a highly regulated manner, in order to eliminate …

  3. Complement System Function - Cleveland Clinic

    The complement system is part of your body’s immune system that cleans up damaged cells, helps your body heal after an injury or an infection and destroys microscopic organisms like …

  4. Complement System and Classical pathway - Microbe Notes

    Jun 16, 2023 · The complement system constitutes a cascade of interactions between a large number of heat-labile plasma proteins called complements. These proteins are inactively …

  5. Complement System – Definition, Activation, Effects, Regulation

    Apr 9, 2024 · The complement system, also known as the complement cascade, is a component of the immune system that boosts the ability of antibodies and phagocytic cells to eliminate …

  6. Complement System - Immunology; Allergic Disorders - MSD …

    The complement system is an enzyme cascade that helps defend against infection via activation of a local inflammatory response. Many complement proteins occur in serum as inactive …

  7. Complement | Description, Function, & Activation | Britannica

    Dec 23, 2025 · complement, in immunology, a complex system comprising a large number of proteins that act in concert to help eliminate infectious microorganisms.

  8. The complement system - PMC

    The complement system is composed of a network of proteins that play an important role in innate and adaptive immunity that range from opsonization of pathogens and chemoattraction to …

  9. What Is the Complement System in Immunology? - Biology Insights

    Jul 24, 2025 · Explore the complement system, a network of blood proteins acting as a surveillance and response mechanism essential for immune defense against pathogens.

  10. A guide to complement biology, pathology and therapeutic

    Sep 5, 2023 · Complement has long been considered a key innate immune effector system that mediates host defence and tissue homeostasis. Yet, growing evidence has illuminated a …