The Immediate Defensive Reaction (by Vertebrate Tissue) to Infection or Injury Caused by Chemical or Physical Agents. the Process Is Characterized by Local Vasodilation Extravasation of Plasma Into Intercellular Spaces and Accumulation of White Blood Cells and Macrophages.
Any Process Involved in the Activation of Any of the Steps of the Complement Cascade Which Allows For the Direct Killing of Microbes the Disposal of Immune Complexes and the Regulation of Other Immune Processes; the Initial Steps of Complement Activation Involve One of Three Pathways the Classical Pathway the Alternative Pathway and the Lectin Pathway All of Which Lead to the Terminal Complement Pathway.
The Space External to the Outermost Structure of a Cell. For Cells Without External Protective or External Encapsulating Structures This Refers to Space Outside of the Plasma Membrane. This Term Covers the Host Cell Environment Outside an Intracellular Parasite.