White Blood Cells - Immune cells found in the blood and lymph vessels., Antibodies - Y shaped proteins that match the antigens of specific pathogens., Antigens - A substance that the body recognises as foreign e.g. spike proteins on the virus, Non specific Immune Response - Also known as innate immune system. Macrophages and Neutrophils engulf and destroy various pathogens., Specific Immune Response - Also known as the adaptive immune response. B and T cells destroy specific pathogens and some remain as memory cells.  , Fever - High body temperature caused by the immune system trying to kill off pathogens., Primary Defense - Skin, mucous, tears, and other protective layers that stop a pathogen entering the body., Secondary Defense - Inflammatory response that widens blood vessels near infection site so Macrophage and Neutrophils cells can quickly arrive., Macrophage Cells - White blood cells that consume pathogens by phagocytosis., Pathogens - Infective agents that enter the body and cause disease e.g. viruses, bacteria, parasites, Tertiary Defense - Specific immune cells (B, T) are activated to hunt down and destroy pathogens., T Cells - White blood cells that can destroy body cells infected with virus., B Cells - Produce antibodies against specific antigens on the surface of bacteria and viruses., Vaccines - Provides artificial immunity. Weakened virus is injected into a human to activate B cells to make antibodies WITHOUT actually getting sick., Memory Cells - B and T cells that recognise previous pathogen infections and provide immunity against future infections., Innate immunity - A type of general protection you are born with., Adaptive immunity - An active protection we acquire from exposure to pathogens or through vaccines., Passive Immunity - Short term protection against pathogens from antibodies.,

CB 1.1 Immune System

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