Immune system - Wikipedia Immunology covers the study of all aspects of the immune system The immune system protects its host from infection with layered defenses of increasing specificity Physical barriers prevent pathogens such as bacteria and viruses from entering the organism [1]
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Immune system | Description, Function, Facts | Britannica immune system, the complex group of defense responses found in humans and other advanced vertebrates that helps repel disease-causing organisms (pathogens) Immunity from disease is actually conferred by two cooperative defense systems, called nonspecific, innate immunity and specific, acquired immunity
The immune system: Cells, tissues, function, and disease In autoimmune diseases and allergies, the immune system mistakenly perceives healthy tissue as unhealthy and launches an unnecessary attack, leading to uncomfortable and sometimes dangerous
Immune System: Your Body’s Defense - WebMD When you understand everything that your immune system does for you and how everyday things affect it, you can help it keep you well Your immune system uses white blood cells, antibodies, and